ID: 801701

5-(1,3-dioxolan-2-yl)-2-fluoropyridine			$$$$
M. F.	C8H8FNO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18068 Database Data ID
M. W.	169.1530232
CAS	1034467-47-4
Similarity	N/A

ID: 801702

2-chloro-4-(1,3-dioxolan-2-yl)pyridine			$$$$
M. F.	C8H8ClNO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18069 Database Data ID
M. W.	185.60762
CAS
Similarity	N/A

ID: 801703

methyl 4-(1,3-dioxolan-2-yl)pyridine-2-carboxylate			$$$$
M. F.	C10H11NO4	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18070 Database Data ID
M. W.	209.19864
CAS
Similarity	N/A

ID: 801704

4-(1,3-dioxolan-2-yl)pyridine-2-carbaldehyde			$$$$
M. F.	C9H9NO3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18071 Database Data ID
M. W.	179.17266
CAS
Similarity	N/A

ID: 801705

[4-(1,3-dioxolan-2-yl)pyridin-2-yl]methanamine			$$$$
M. F.	C9H12N2O2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18072 Database Data ID
M. W.	180.20378
CAS
Similarity	N/A

ID: 801706

2-(chloromethyl)-4-(1,3-dioxolan-2-yl)pyridine			$$$$
M. F.	C9H10ClNO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18073 Database Data ID
M. W.	199.6342
CAS
Similarity	N/A

ID: 801707

1-[4-(1,3-dioxolan-2-yl)pyridin-2-yl]ethan-1-one			$$$$
M. F.	C10H11NO3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18074 Database Data ID
M. W.	193.19924
CAS
Similarity	N/A

ID: 801708

1-[5-(1,3-dioxolan-2-yl)pyridin-2-yl]ethan-1-one			$$$$
M. F.	C10H11NO3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18075 Database Data ID
M. W.	193.19924
CAS
Similarity	N/A

ID: 801709

methyl 5-(1,3-dioxolan-2-yl)pyridine-2-carboxylate			$$$$
M. F.	C10H11NO4	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18076 Database Data ID
M. W.	209.19864
CAS
Similarity	N/A

ID: 801710

5-(1,3-dioxolan-2-yl)pyridine-2-carbaldehyde			$$$$
M. F.	C9H9NO3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18077 Database Data ID
M. W.	179.17266
CAS
Similarity	N/A

ID: 801711

2-(chloromethyl)-5-(1,3-dioxolan-2-yl)pyridine			$$$$
M. F.	C9H10ClNO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18078 Database Data ID
M. W.	199.6342
CAS
Similarity	N/A

ID: 801712

ethyl 2-[5-(1,3-dioxolan-2-yl)pyridin-2-yl]acetate			$$$$
M. F.	C12H15NO4	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18079 Database Data ID
M. W.	237.2518
CAS
Similarity	N/A

ID: 801713

5-(1,3-dioxolan-2-yl)pyridin-2-amine			$$$$
M. F.	C8H10N2O2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18080 Database Data ID
M. W.	166.1772
CAS
Similarity	N/A

ID: 801714

methyl 5-(1,3-dioxolan-2-yl)pyridine-3-carboxylate			$$$$
M. F.	C10H11NO4	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18081 Database Data ID
M. W.	209.19864
CAS
Similarity	N/A

ID: 801715

3-(chloromethyl)-5-(1,3-dioxolan-2-yl)pyridine			$$$$
M. F.	C9H10ClNO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18082 Database Data ID
M. W.	199.6342
CAS
Similarity	N/A

ID: 801716

[5-(1,3-dioxolan-2-yl)pyridin-3-yl]methanamine			$$$$
M. F.	C9H12N2O2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18083 Database Data ID
M. W.	180.20378
CAS
Similarity	N/A

ID: 801717

{[5-(1,3-dioxolan-2-yl)pyridin-3-yl]methyl}(methyl)amine			$$$$
M. F.	C10H14N2O2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18084 Database Data ID
M. W.	194.23036
CAS
Similarity	N/A

ID: 801718

1-[5-(1,3-dioxolan-2-yl)pyridin-3-yl]ethan-1-one			$$$$
M. F.	C10H11NO3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18085 Database Data ID
M. W.	193.19924
CAS
Similarity	N/A

ID: 801719

{[3-(1,3-dioxolan-2-yl)phenyl]methyl}(methyl)amine			$$$$
M. F.	C11H15NO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18086 Database Data ID
M. W.	193.2423
CAS
Similarity	N/A

ID: 801720

3-(1,3-dioxolan-2-yl)benzaldehyde			$$$$
M. F.	C10H10O3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18088 Database Data ID
M. W.	178.1846
CAS	68348-23-2
Similarity	N/A

ID: 801721

2-[3-(chloromethyl)phenyl]-1,3-dioxolane			$$$$
M. F.	C10H11ClO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18089 Database Data ID
M. W.	198.64614
CAS
Similarity	N/A

ID: 801722

5-(1,3-dioxolan-2-yl)-2-fluorobenzaldehyde			$$$$
M. F.	C10H9FO3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18090 Database Data ID
M. W.	196.1750632
CAS
Similarity	N/A

ID: 801723

5-(1,3-dioxolan-2-yl)-2-fluorobenzoic acid			$$$$
M. F.	C10H9FO4	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18091 Database Data ID
M. W.	212.1744632
CAS
Similarity	N/A

ID: 801724

1-[5-(1,3-dioxolan-2-yl)-2-fluorophenyl]ethan-1-one			$$$$
M. F.	C11H11FO3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18092 Database Data ID
M. W.	210.2016432
CAS
Similarity	N/A

ID: 801725

6-(1,3-dioxolan-2-yl)pyridine-3-carbaldehyde			$$$$
M. F.	C9H9NO3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18093 Database Data ID
M. W.	179.17266
CAS
Similarity	N/A

ID: 801726

1-[6-(1,3-dioxolan-2-yl)pyridin-3-yl]ethan-1-one			$$$$
M. F.	C10H11NO3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18094 Database Data ID
M. W.	193.19924
CAS
Similarity	N/A

ID: 801727

5-(chloromethyl)-2-(1,3-dioxolan-2-yl)pyridine			$$$$
M. F.	C9H10ClNO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18095 Database Data ID
M. W.	199.6342
CAS
Similarity	N/A

ID: 801728

6-(1,3-dioxolan-2-yl)pyridine-3-carboxylic acid			$$$$
M. F.	C9H9NO4	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18096 Database Data ID
M. W.	195.17206
CAS
Similarity	N/A

ID: 801729

4-bromo-2-(1,3-dioxolan-2-yl)pyridine			$$$$
M. F.	C8H8BrNO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18097 Database Data ID
M. W.	230.05862
CAS
Similarity	N/A

ID: 801730

2-(1,3-dioxolan-2-yl)pyridine-4-carbaldehyde			$$$$
M. F.	C9H9NO3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18098 Database Data ID
M. W.	179.17266
CAS
Similarity	N/A

ID: 801731

1-[2-(1,3-dioxolan-2-yl)pyridin-4-yl]ethan-1-one			$$$$
M. F.	C10H11NO3	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18099 Database Data ID
M. W.	193.19924
CAS
Similarity	N/A

ID: 801732

4-(chloromethyl)-2-(1,3-dioxolan-2-yl)pyridine			$$$$
M. F.	C9H10ClNO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18100 Database Data ID
M. W.	199.6342
CAS
Similarity	N/A

ID: 801733

2,2,6,6-tetramethyloxane-4-carbaldehyde			$$$$
M. F.	C10H18O2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18101 Database Data ID
M. W.	170.24872
CAS
Similarity	N/A

ID: 801734

4-(1,2-oxazol-4-yl)piperidine			$$$$
M. F.	C8H12N2O	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18102 Database Data ID
M. W.	152.19368
CAS
Similarity	N/A

ID: 801735

3-bromo-7-chloroisoquinoline			$$$$
M. F.	C9H5BrClN	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18103 Database Data ID
M. W.	242.4997
CAS	1246552-90-8
Similarity	N/A

ID: 801736

3-bromo-7-(trifluoromethyl)isoquinoline			$$$$
M. F.	C10H5BrF3N	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18104 Database Data ID
M. W.	276.0526096
CAS
Similarity	N/A

ID: 801737

2-(trifluoromethyl)quinoline-6-carbaldehyde			$$$$
M. F.	C11H6F3NO	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18105 Database Data ID
M. W.	225.1666496
CAS
Similarity	N/A

ID: 801738

[2-(trifluoromethyl)quinolin-6-yl]methanamine			$$$$
M. F.	C11H9F3N2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18106 Database Data ID
M. W.	226.1977696
CAS
Similarity	N/A

ID: 801739

[2-(trifluoromethyl)quinolin-6-yl]boronic acid			$$$$
M. F.	C10H7BF3NO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18107 Database Data ID
M. W.	240.9742896
CAS
Similarity	N/A

ID: 801740

2-(trifluoromethyl)quinoline-5-carbaldehyde			$$$$
M. F.	C11H6F3NO	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18108 Database Data ID
M. W.	225.1666496
CAS
Similarity	N/A

ID: 801741

2-(trifluoromethyl)quinoline-5-carboxylic acid			$$$$
M. F.	C11H6F3NO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18109 Database Data ID
M. W.	241.1660496
CAS
Similarity	N/A

ID: 801742

2-chloroquinoline-5-carbaldehyde			$$$$
M. F.	C10H6ClNO	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18110 Database Data ID
M. W.	191.61374
CAS
Similarity	N/A

ID: 801743

[2-(trifluoromethyl)quinolin-5-yl]methanamine			$$$$
M. F.	C11H9F3N2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18111 Database Data ID
M. W.	226.1977696
CAS
Similarity	N/A

ID: 801744

[2-(trifluoromethyl)quinolin-5-yl]boronic acid			$$$$
M. F.	C10H7BF3NO2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18112 Database Data ID
M. W.	240.9742896
CAS
Similarity	N/A

ID: 801745

2-(trifluoromethyl)quinoline-7-carbaldehyde			$$$$
M. F.	C11H6F3NO	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18113 Database Data ID
M. W.	225.1666496
CAS
Similarity	N/A

ID: 801746

[2-(trifluoromethyl)quinolin-7-yl]methanamine			$$$$
M. F.	C11H9F3N2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18114 Database Data ID
M. W.	226.1977696
CAS
Similarity	N/A

ID: 801747

1-tert-butyl-1H-1,2,3-triazole-4-carbaldehyde			$$$$
M. F.	C7H11N3O	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18115 Database Data ID
M. W.	153.18174
CAS	129027-65-2
Similarity	N/A

ID: 801748

7-methyl-1,2,3,4-tetrahydro-1,6-naphthyridine			$$$$
M. F.	C9H12N2	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18116 Database Data ID
M. W.	148.20498
CAS
Similarity	N/A

ID: 801749

5-methoxy-1,2,3,4-tetrahydro-1,6-naphthyridine			$$$$
M. F.	C9H12N2O	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18117 Database Data ID
M. W.	164.20438
CAS
Similarity	N/A

ID: 801750

7-methoxy-1,2,3,4-tetrahydro-1,6-naphthyridine			$$$$
M. F.	C9H12N2O	Custom Synthesis Information This compound is available through custom synthesis, please feel free to contact us for a quote. Email: info@chembase.cn Suppliers Catalog Number A&J Pharmtech AJA-O18118 Database Data ID
M. W.	164.20438
CAS
Similarity	N/A

• ID:801701

  

  5-(1,3-dioxolan-2-yl)-2-fluoropyridine

• ID:801702

  

  2-chloro-4-(1,3-dioxolan-2-yl)pyridine

• ID:801703

  

  methyl 4-(1,3-dioxolan-2-yl)pyridine-2-carboxylate

• ID:801704

  

  4-(1,3-dioxolan-2-yl)pyridine-2-carbaldehyde

• ID:801705

  

  [4-(1,3-dioxolan-2-yl)pyridin-2-yl]methanamine

• ID:801706

  

  2-(chloromethyl)-4-(1,3-dioxolan-2-yl)pyridine

• ID:801707

  

  1-[4-(1,3-dioxolan-2-yl)pyridin-2-yl]ethan-1-one

• ID:801708

  

  1-[5-(1,3-dioxolan-2-yl)pyridin-2-yl]ethan-1-one

• ID:801709

  

  methyl 5-(1,3-dioxolan-2-yl)pyridine-2-carboxylate

• ID:801710

  

  5-(1,3-dioxolan-2-yl)pyridine-2-carbaldehyde

• ID:801711

  

  2-(chloromethyl)-5-(1,3-dioxolan-2-yl)pyridine

• ID:801712

  

  ethyl 2-[5-(1,3-dioxolan-2-yl)pyridin-2-yl]acetate

• ID:801713

  

  5-(1,3-dioxolan-2-yl)pyridin-2-amine

• ID:801714

  

  methyl 5-(1,3-dioxolan-2-yl)pyridine-3-carboxylate

• ID:801715

  

  3-(chloromethyl)-5-(1,3-dioxolan-2-yl)pyridine

• ID:801716

  

  [5-(1,3-dioxolan-2-yl)pyridin-3-yl]methanamine

• ID:801717

  

  {[5-(1,3-dioxolan-2-yl)pyridin-3-yl]methyl}(methyl)amine

• ID:801718

  

  1-[5-(1,3-dioxolan-2-yl)pyridin-3-yl]ethan-1-one

• ID:801719

  

  {[3-(1,3-dioxolan-2-yl)phenyl]methyl}(methyl)amine

• ID:801720

  

  3-(1,3-dioxolan-2-yl)benzaldehyde

• ID:801721

  

  2-[3-(chloromethyl)phenyl]-1,3-dioxolane

• ID:801722

  

  5-(1,3-dioxolan-2-yl)-2-fluorobenzaldehyde

• ID:801723

  

  5-(1,3-dioxolan-2-yl)-2-fluorobenzoic acid

• ID:801724

  

  1-[5-(1,3-dioxolan-2-yl)-2-fluorophenyl]ethan-1-one

• ID:801725

  

  6-(1,3-dioxolan-2-yl)pyridine-3-carbaldehyde

• ID:801726

  

  1-[6-(1,3-dioxolan-2-yl)pyridin-3-yl]ethan-1-one

• ID:801727

  

  5-(chloromethyl)-2-(1,3-dioxolan-2-yl)pyridine

• ID:801728

  

  6-(1,3-dioxolan-2-yl)pyridine-3-carboxylic acid

• ID:801729

  

  4-bromo-2-(1,3-dioxolan-2-yl)pyridine

• ID:801730

  

  2-(1,3-dioxolan-2-yl)pyridine-4-carbaldehyde

• ID:801731

  

  1-[2-(1,3-dioxolan-2-yl)pyridin-4-yl]ethan-1-one

• ID:801732

  

  4-(chloromethyl)-2-(1,3-dioxolan-2-yl)pyridine

• ID:801733

  

  2,2,6,6-tetramethyloxane-4-carbaldehyde

• ID:801734

  

  4-(1,2-oxazol-4-yl)piperidine

• ID:801735

  

  3-bromo-7-chloroisoquinoline

• ID:801736

  

  3-bromo-7-(trifluoromethyl)isoquinoline

• ID:801737

  

  2-(trifluoromethyl)quinoline-6-carbaldehyde

• ID:801738

  

  [2-(trifluoromethyl)quinolin-6-yl]methanamine

• ID:801739

  

  [2-(trifluoromethyl)quinolin-6-yl]boronic acid

• ID:801740

  

  2-(trifluoromethyl)quinoline-5-carbaldehyde

• ID:801741

  

  2-(trifluoromethyl)quinoline-5-carboxylic acid

• ID:801742

  

  2-chloroquinoline-5-carbaldehyde

• ID:801743

  

  [2-(trifluoromethyl)quinolin-5-yl]methanamine

• ID:801744

  

  [2-(trifluoromethyl)quinolin-5-yl]boronic acid

• ID:801745

  

  2-(trifluoromethyl)quinoline-7-carbaldehyde

• ID:801746

  

  [2-(trifluoromethyl)quinolin-7-yl]methanamine

• ID:801747

  

  1-tert-butyl-1H-1,2,3-triazole-4-carbaldehyde

• ID:801748

  

  7-methyl-1,2,3,4-tetrahydro-1,6-naphthyridine

• ID:801749

  

  5-methoxy-1,2,3,4-tetrahydro-1,6-naphthyridine

• ID:801750

  

  7-methoxy-1,2,3,4-tetrahydro-1,6-naphthyridine