Chembase list of 866358 unique molecular structures

$$$$ Data

M. F.

C9H11NO3

Suppliers	Catalog Number
Sigma Aldrich	209570
Apollo Scientific	OR6593
Bide Pharmatech	BD6850

Database	Data ID
PubChem	596465

M. W.

181.18854

CAS

81029-03-0

Similarity

N/A

ID: 91102

1-methoxy-4-nitrobenzene

$$$$ Data More

M. F.

C7H7NO3

Suppliers	Catalog Number
Sigma Aldrich	103543 36916
MP Biomedicals	05216331
Alfa Aesar	A19152

Database	Data ID
PubChem	7485

M. W.

153.13538

CAS

66300-61-6

Similarity

N/A

ID: 91103

N-(3-acetylphenyl)acetamide

$$$$ Data More

M. F.

C10H11NO2

Suppliers	Catalog Number
Sigma Aldrich	00188
Alfa Aesar	A12188
Apollo Scientific	OR6598

Database	Data ID
PubChem	346202

M. W.

177.19984

CAS

7463-31-2

Similarity

N/A

ID: 91104

(1R,2R,3S,4R,5R,6S)-7-oxabicyclo[4.1.0]heptane-2,3,4,5-tetrol

$$$$ Data

M. F.

C6H10O5

Suppliers	Catalog Number
Apollo Scientific	OR6600T

Database	Data ID
PubChem	25797774

M. W.

162.1406

CAS

6090-95-5

Similarity

N/A

ID: 91105

1-bromo-2-methoxy-4-nitrobenzene

$$$$ Data More

M. F.

C7H6BrNO3

Suppliers	Catalog Number
Alfa Aesar	B25331
Apollo Scientific	OR6601
Chemik	CHB85616

Database	Data ID
PubChem	101293

M. W.

232.03144

CAS

77337-82-7

Similarity

N/A

ID: 91106

1-chloro-4-iodo-2-methoxybenzene

$$$$ Data

M. F.

C7H6ClIO

Suppliers	Catalog Number
Apollo Scientific	OR6602

Database	Data ID
PubChem	11587088

M. W.

268.47941

CAS

Similarity

N/A

ID: 91107

2-chloro-5-iodophenol

$$$$ Data

M. F.

C6H4ClIO

Suppliers	Catalog Number
Apollo Scientific	OR6603
A&J Pharmtech	AJA-O3609

Database	Data ID
PubChem	1714412

M. W.

254.45283

CAS

289039-26-5

Similarity

N/A

ID: 91108

{[5-(benzyloxy)-1H-indol-3-yl]methyl}dimethylamine

$$$$ Data

M. F.

C18H20N2O

Suppliers	Catalog Number
Sigma Aldrich	B27609
MP Biomedicals	02158330 05206675
Apollo Scientific	OR6604

Database	Data ID
PubChem	73814

M. W.

280.3642

CAS

1453-97-0

Similarity

N/A

ID: 91109

N-[4-(benzenesulfonyl)-3-nitrophenyl]acetamide

$$$$ Data

M. F.

C14H12N2O5S

Suppliers	Catalog Number
Apollo Scientific	OR6607

Database	Data ID
PubChem	24721506

M. W.

320.32048

CAS

Similarity

N/A

ID: 91110

2-[(2-hydroxyethyl)sulfanyl]pyridine-3-carbonitrile

$$$$ Data

M. F.

C8H8N2OS

Suppliers	Catalog Number
Apollo Scientific	OR6608

Database	Data ID
PubChem	13213866

M. W.

180.22692

CAS

Similarity

N/A

ID: 91111

potassium 2,3,3-trimethyl-3H-indole-5-sulfonate

$$$$ Data

M. F.

C11H12KNO3S

Suppliers	Catalog Number
Apollo Scientific	OR6609
TRC	T796275

Database	Data ID
PubChem	23681862

M. W.

277.38118

CAS

184351-56-2

Similarity

N/A

ID: 91112

4-acetamidobenzene-1-sulfinic acid

$$$$ Data

M. F.

C8H9NO3S

Suppliers	Catalog Number
MP Biomedicals	05201633
Apollo Scientific	OR6610
TRC	A141870

Database	Data ID
PubChem	412150

M. W.

199.22696

CAS

710-24-7

Similarity

N/A

ID: 91113

5-bromo-2-acetamidobenzoic acid

$$$$ Data

M. F.

C9H8BrNO3

Suppliers	Catalog Number
Sigma Aldrich	568740
Alfa Aesar	L02139
Apollo Scientific	OR6611

Database	Data ID
PubChem	520935

M. W.

258.06872

CAS

38985-79-4

Similarity

N/A

ID: 91114

4-methylpyridin-1-ium-1-olate

$$$$ Data More

M. F.

C6H7NO

Suppliers	Catalog Number
Sigma Aldrich	P42606
MP Biomedicals	05211449
Alfa Aesar	A17330

Database	Data ID
PubChem	13857

M. W.

109.12588

CAS

1003-67-4

Similarity

N/A

ID: 91115

3,4-dihydro-2H-pyran-2-ylmethanol

$$$$ Data

M. F.

C6H10O2

Suppliers	Catalog Number
Sigma Aldrich	55665
Apollo Scientific	OR6613

Database	Data ID
PubChem	95559

M. W.

114.1424

CAS

3749-36-8

Similarity

N/A

ID: 91116

3,4-dihydro-2H-pyran-2-carboxylic acid

$$$$ Data

M. F.

C6H8O3

Suppliers	Catalog Number
Apollo Scientific	OR6614

Database	Data ID
PubChem	118140

M. W.

128.12592

CAS

34201-01-9

Similarity

N/A

ID: 91117

6-methylpyridine-2,3-dicarboxylic acid

$$$$ Data

M. F.

C8H7NO4

Suppliers	Catalog Number
Sigma Aldrich	344184
Apollo Scientific	OR6616
Bide Pharmatech	BD6235

Database	Data ID
PubChem	542567

M. W.

181.14548

CAS

53636-70-7

Similarity

N/A

ID: 91118

tert-butyl 2,6-dichloropyridine-4-carboxylate

$$$$ Data

M. F.

C10H11Cl2NO2

Suppliers	Catalog Number
Apollo Scientific	OR6618

Database	Data ID
PubChem	22594123

M. W.

248.10584

CAS

Similarity

N/A

ID: 91119

2-cyclopentylacetic acid

$$$$ Data More

M. F.

C7H12O2

Suppliers	Catalog Number
Sigma Aldrich	125490
MP Biomedicals	05210885
Alfa Aesar	A15696

Database	Data ID
PubChem	71606

M. W.

128.16898

CAS

1123-00-8

Similarity

N/A

ID: 91120

4-oxo-4-phenylbutanoic acid

$$$$ Data More

M. F.

C10H10O3

Suppliers	Catalog Number
Sigma Aldrich	B13802 13055
MP Biomedicals	05203400
Alfa Aesar	A16636

Database	Data ID
PubChem	72871

M. W.

178.1846

CAS

2051-95-8

Similarity

N/A

ID: 91121

benzyl(thiophen-2-ylmethyl)amine

$$$$ Data

M. F.

C12H13NS

Suppliers	Catalog Number
Apollo Scientific	OR6627
Bide Pharmatech	BD228713

Database	Data ID
PubChem	961320

M. W.

203.30332

CAS

73325-61-8

Similarity

N/A

ID: 91122

3-methoxythiophene

$$$$ Data More

M. F.

C5H6OS

Suppliers	Catalog Number
Sigma Aldrich	374024 65351
Alfa Aesar	B21940
Apollo Scientific	OR6628

Database	Data ID
PubChem	140249

M. W.

114.16554

CAS

17573-92-1

Similarity

N/A

ID: 91123

2,5-dibromothiophene-3-carboxylic acid

$$$$ Data

M. F.

C5H2Br2O2S

Suppliers	Catalog Number
Apollo Scientific	OR6629
Enamine	EN300-79638

Database	Data ID
PubChem	268907

M. W.

285.94118

CAS

7311-70-8

Similarity

N/A

ID: 91124

ethyl 2-(thiophen-3-yl)acetate

$$$$ Data

M. F.

C8H10O2S

Suppliers	Catalog Number
Sigma Aldrich	257656
Alfa Aesar	A19694
Apollo Scientific	OR6630

Database	Data ID
PubChem	520865

M. W.

170.2288

CAS

37784-63-7

Similarity

N/A

ID: 91125

2-(thiophen-3-yl)acetonitrile

$$$$ Data More

M. F.

C6H5NS

Suppliers	Catalog Number
Sigma Aldrich	219193
Alfa Aesar	A12805
Apollo Scientific	OR6631

Database	Data ID
PubChem	83730

M. W.

123.1756

CAS

13781-53-8

Similarity

N/A

ID: 91126

3-(chloromethyl)thiophene

$$$$ Data

M. F.

C5H5ClS

Suppliers	Catalog Number
Apollo Scientific	OR6634
A&J Pharmtech	AJA-O13793

Database	Data ID
PubChem	12487462

M. W.

132.6112

CAS

2746-23-8

Similarity

N/A

ID: 91127

2-(3,5-dibromophenyl)acetic acid

$$$$ Data

M. F.

C8H6Br2O2

Suppliers	Catalog Number
Apollo Scientific	OR6636
Chemik	CHB15571

Database	Data ID
PubChem	5323841

M. W.

293.94004

CAS

188347-49-1

Similarity

N/A

ID: 91128

N-(4-methyl-3-nitrophenyl)acetamide

$$$$ Data

M. F.

C9H10N2O3

Suppliers	Catalog Number
Apollo Scientific	OR6637

Database	Data ID
PubChem	73133

M. W.

194.1873

CAS

2719-14-4

Similarity

N/A

ID: 91129

1-chloro-5-methyl-2,4-dinitrobenzene

$$$$ Data More

M. F.

C7H5ClN2O4

Suppliers	Catalog Number
Sigma Aldrich	553859
Alfa Aesar	L11808
Apollo Scientific	OR6640

Database	Data ID
PubChem	253802

M. W.

216.5786

CAS

51676-74-5

Similarity

N/A

ID: 91130

2-[(2-nitrophenyl)sulfanyl]aniline

$$$$ Data

M. F.

C12H10N2O2S

Suppliers	Catalog Number
Apollo Scientific	OR6644

Database	Data ID
PubChem	699904

M. W.

246.285

CAS

Similarity

N/A

ID: 91131

1-N-phenylbenzene-1,2-diamine

$$$$ Data More

M. F.

C12H12N2

Suppliers	Catalog Number
Sigma Aldrich	P28352 07900
MP Biomedicals	05206479
Alfa Aesar	L11616

Database	Data ID
PubChem	68297

M. W.

184.23708

CAS

534-85-0

Similarity

N/A

ID: 91132

1-nitro-2-phenoxybenzene

$$$$ Data More

M. F.

C12H9NO3

Suppliers	Catalog Number
Sigma Aldrich	73307
MP Biomedicals	05204672
Alfa Aesar	A18088

Database	Data ID
PubChem	16661

M. W.

215.20476

CAS

2216-12-8

Similarity

N/A

ID: 91133

(1R,2S,3S,4S)-cyclohex-5-ene-1,2,3,4-tetrol

$$$$ Data

M. F.

C6H10O4

Suppliers	Catalog Number
Apollo Scientific	OR6650T

Database	Data ID
PubChem	11029971

M. W.

146.1412

CAS

25348-64-5

Similarity

N/A

ID: 91134

1-ethoxy-2-nitrobenzene

$$$$ Data

M. F.

C8H9NO3

Suppliers	Catalog Number
Apollo Scientific	OR6651
Chemik	CHB85665

Database	Data ID
PubChem	11889

M. W.

167.16196

CAS

610-67-3

Similarity

N/A

ID: 91135

2-(2-nitrophenoxy)ethan-1-ol

$$$$ Data

M. F.

C8H9NO4

Suppliers	Catalog Number
Apollo Scientific	OR6653

Database	Data ID
PubChem	2737059

M. W.

183.16136

CAS

Similarity

N/A

ID: 91136

2-(benzylsulfanyl)aniline

$$$$ Data

M. F.

C13H13NS

Suppliers	Catalog Number
Apollo Scientific	OR6654
Enamine	EN300-13179

Database	Data ID
PubChem	80616

M. W.

215.31402

CAS

6325-92-4

Similarity

N/A

ID: 91137

ethyl 2-[(2-aminophenyl)sulfanyl]acetate

$$$$ Data

M. F.

C10H13NO2S

Suppliers	Catalog Number
Apollo Scientific	OR6657

Database	Data ID
PubChem	2736362

M. W.

211.28072

CAS

Similarity

N/A

ID: 91138

ethyl 2-[(2-nitrophenyl)sulfanyl]acetate

$$$$ Data

M. F.

C10H11NO4S

Suppliers	Catalog Number
Apollo Scientific	OR6658

Database	Data ID
PubChem	798528

M. W.

241.26364

CAS

Similarity

N/A

ID: 91139

1-ethoxy-4-nitrobenzene

$$$$ Data

M. F.

C8H9NO3

Suppliers	Catalog Number
Sigma Aldrich	289671
MP Biomedicals	05216384
Apollo Scientific	OR6660

Database	Data ID
PubChem	7495

M. W.

167.16196

CAS

100-29-8

Similarity

N/A

ID: 91140

2-[(2-nitrophenyl)amino]ethan-1-ol

$$$$ Data

M. F.

C8H10N2O3

Suppliers	Catalog Number
Apollo Scientific	OR6662
Enamine	EN300-08711
A&J Pharmtech	AJA-O9339

Database	Data ID
PubChem	78637

M. W.

182.1766

CAS

4926-55-0

Similarity

N/A

ID: 91141

1-N-benzylbenzene-1,2-diamine

$$$$ Data

M. F.

C13H14N2

Suppliers	Catalog Number
Apollo Scientific	OR6664
A&J Pharmtech	AJA-O13591

Database	Data ID
PubChem	2735482

M. W.

198.26366

CAS

5822-13-9

Similarity

N/A

ID: 91142

3-methyl-1-benzothiophene-2-sulfonyl chloride

$$$$ Data

M. F.

C9H7ClO2S2

Suppliers	Catalog Number
Apollo Scientific	OR6665

Database	Data ID
PubChem	2736815

M. W.

246.73368

CAS

Similarity

N/A

ID: 91143

2-nitrobenzene-1-thiol

$$$$ Data

M. F.

C6H5NO2S

Suppliers	Catalog Number
Apollo Scientific	OR6666

Database	Data ID
PubChem	21002

M. W.

155.1744

CAS

4875-10-9

Similarity

N/A

ID: 91144

methyl pent-2-enoate

$$$$ Data

M. F.

C6H10O2

Suppliers	Catalog Number
Apollo Scientific	OR6667

Database	Data ID
PubChem	5364718

M. W.

114.1424

CAS

15790-88-2

Similarity

N/A

ID: 91145

4-(naphthalen-1-yloxy)aniline

$$$$ Data

M. F.

C16H13NO

Suppliers	Catalog Number
Apollo Scientific	OR6668

Database	Data ID
PubChem	819583

M. W.

235.28052

CAS

Similarity

N/A

ID: 91146

N-benzyl-2-nitroaniline

$$$$ Data

M. F.

C13H12N2O2

Suppliers	Catalog Number
Apollo Scientific	OR6670
Bide Pharmatech	BD14625
A&J Pharmtech	AJA-O13590

Database	Data ID
PubChem	521800

M. W.

228.24658

CAS

5729/6/6

Similarity

N/A

ID: 91147

1-(4-nitrophenoxy)naphthalene

$$$$ Data

M. F.

C16H11NO3

Suppliers	Catalog Number
Apollo Scientific	OR6671

Database	Data ID
PubChem	762479

M. W.

265.26344

CAS

Similarity

N/A

ID: 91148

1-(benzyloxy)-4-nitrobenzene

$$$$ Data

M. F.

C13H11NO3

Suppliers	Catalog Number
MP Biomedicals	05222464
Apollo Scientific	OR6672
Enamine	EN300-15495

Database	Data ID
PubChem	70842

M. W.

229.23134

CAS

5107-52-8

Similarity

N/A

ID: 91149

1-butoxy-4-nitrobenzene

$$$$ Data

M. F.

C10H13NO3

Suppliers	Catalog Number
Apollo Scientific	OR6673

Database	Data ID
PubChem	81658

M. W.

195.21512

CAS

Similarity

N/A

ID: 91150

2-chloro-1-(3-chlorophenyl)ethan-1-one

$$$$ Data

M. F.

C8H6Cl2O

Suppliers	Catalog Number
Apollo Scientific	OR6674

Database	Data ID
PubChem	168006

M. W.

189.03864

CAS

21886-56-6

Similarity

N/A

Part I: Carbon
- I.1: Carbon-Carbon Bonds
- I.1.1 Alkanes
- Primary carbon
- Secondary carbon
- Tertiary carbon
- Quaternary carbon
- I.1.2 C-C double and Triple Bonds
- Alkene
- Alkyne
- Allene
- I.2: One Carbon-Hetero Bond
- I.2.1 Alkyl Halogenides
- Alkylchloride
- Alkylfluoride
- Alkylbromide
- Alkyliodide
- I.2.2 Alcohols and Ethers
- Alcohol
- Primary alcohol
- Secondary alcohol
- Tertiary alcohol
- Dialkylether
- Dialkylthioether
- Alkylarylether
- Diarylether
- Alkylarylthioether
- Diarylthioether
- Oxonium
- I.2.3 Amines
- Amine
- Primary aliphatic amine
- Secondary aliphatic amine
- Tertiary aliphatic amine
- Quaternary aliphatic ammonium
- Primary aromatic amine
- Secondary aromatic amine
- Tertiary aromatic amine
- Quaternary aromatic ammonium
- Secondary mixed amine
- Tertiary mixed amine
- Quaternary mixed ammonium
- Ammonium
- I.2.4 Others
- Alkylthiol
- Dialkylthioether
- Alkylarylthioether
- Disulfide
- 1,2-Aminoalcohol
- 1,2-Diol
- 1,1-Diol
- Hydroperoxide
- Peroxo
- Organolithium compounds
- Organomagnesium compounds
- Organometallic compounds
- I.3: Two Carbon-Hetero Bonds (Carbonyl and Derivatives)
- I.3.1 Double Bond to Hetero
- Aldehyde
- Ketone
- Thioaldehyde
- Thioketone
- Imine
- Immonium
- Oxime
- Oximether
- I.3.2. Two Single Bonds to Hetero
- Acetal
- Hemiacetal
- Aminal
- Hemiaminal
- Thioacetal
- Thiohemiacetal
- Halogen acetal like
- Acetal like
- Halogenmethylen ester and similar
- NOS methylen ester and similar
- Hetero methylen ester and similar
- Cyanhydrine
- I.3.3 Single Bond to Hetero, C=C Double Bond (Enols and Similar)
- Chloroalkene
- Fluoroalkene
- Bromoalkene
- Iodoalkene
- Enol
- Endiol
- Enolether
- Enolester
- Enamine
- Thioenol
- Thioenolether
- I.4: Three Carbon-Hetero Bonds (Carboxyl and Derivatives)
- Acylchloride
- Acylfluoride
- Acylbromide
- Acyliodide
- Acylhalide
- Carboxylic acid
- Carboxylic ester
- Lactone
- Carboxylic anhydride
- Carboxylic acid derivative
- Carbothioic acid
- Carbothioic S ester
- Carbothioic S lactone
- Carbothioic O ester
- Carbothioic O lactone
- Carbothioic halide
- Carbodithioic acid
- Carbodithioic ester
- Carbodithiolactone
- Amide
- Primary amide
- Secondary amide
- Tertiary amide
- Lactam
- Alkyl imide
- N hetero imide
- Imide acidic
- Thioamide
- Thiolactam
- Oximester
- Amidine
- Hydroxamic acid
- Hydroxamic acid ester
- Imidoacid
- Imidoacid cyclic
- Imidoester
- Imidolactone
- Imidothioacid
- Imidothioacid cyclic
- Imidothioester
- Imidothiolactone
- Amidine
- Imidolactam
- Imidoylhalide
- Imidoylhalide cyclic
- Amidrazone
- Alpha aminoacid
- Alpha hydroxyacid
- Peptide middle
- Peptide C term
- Peptide N term
- Carboxylic orthoester
- Ketene
- Ketenacetal
- Nitrile
- Isonitrile
- Vinylogous carbonyl or carboxyl derivative
- Vinylogous acid
- Vinylogous ester
- Vinylogous amide
- Vinylogous halide
- I.5: Four Carbon-Hetero Bonds (Carbonic Acid and Derivatives)
- Carbonic acid dieester
- Carbonic acid esterhalide
- Carbonic acid monoester
- Carbonic acid derivatives
- Thiocarbonic acid dieester
- Thiocarbonic acid esterhalide
- Thiocarbonic acid monoester
- Urea
- Thiourea
- Isourea
- Isothiourea
- Guanidine
- Carbaminic acid
- Urethan(Carbamate ester)
- Biuret
- Semicarbazide
- Carbazide
- Semicarbazone
- Carbazone
- Thiosemicarbazide
- Thiocarbazide
- Thiosemicarbazone
- Thiocarbazone
- Isocyanate
- Cyanate
- Isothiocyanate
- Thiocyanate
- Carbodiimide
- Orthocarbonic derivatives
- I.6 Aromatics
- Phenol
- 1,2-Diphenol
- Arylchloride
- Arylfluoride
- Arylbromide
- Aryliodide
- Arylthiol
- Iminoarene
- Oxoarene
- Thioarene
- Hetero N basic H
- Hetero N basic no H
- Hetero N nonbasic
- Hetero O
- Hetero S
- Heteroaromatic
Part II: N, S, P, Si, B
- II.1 Nitrogen
- Nitrite
- Thionitrite
- Nitrate
- Nitro
- Nitroso
- Azide
- Acylazide
- Diazo
- Diazonium
- Nitrosamine
- Nitrosamide
- N-Oxide
- Hydrazine
- Hydrazone
- Hydroxylamine
- II.2 Sulfur
- Sulfon
- Sulfoxide
- Sulfonium
- Sulfuric acid
- Sulfuric monoester
- Sulfuric diester
- Sulfuric monoamide
- Sulfuric diamide
- Sulfuric esteramide
- Sulfuric derivative
- Sulfonic acid
- Sulfonamide
- Sulfonic ester
- Sulfonic halide
- Sulfonic derivative
- Sulfinic acid
- Sulfinic amide
- Sulfinic ester
- Sulfinic halide
- Sulfinic derivative
- Sulfenic acid
- Sulfenic amide
- Sulfenic ester
- Sulfenic halide
- Sulfenic derivative
- II.3 Phosphorous
- Phosphine
- Phosphine oxide
- Phosphonium
- Phosphorylen
- Phosphonic acid
- Phosphonic monoester
- Phosphonic diester
- Phosphonic monoamide
- Phosphonic diamide
- Phosphonic esteramide
- Phosphonic acid derivative
- Phosphoric acid
- Phosphoric monoester
- Phosphoric diester
- Phosphoric triester
- Phosphoric monoamide
- Phosphoric diamide
- Phosphoric triamide
- Phosphoric monoestermonoamide
- Phosphoric diestermonoamide
- Phosphoric monoesterdiamide
- Phosphoric acid derivative
- Phosphinic acid
- Phosphinic ester
- Phosphinic amide
- Phosphinic acid derivative
- Phosphonous acid
- Phosphonous monoester
- Phosphonous diester
- Phosphonous monoamide
- Phosphonous diamide
- Phosphonous esteramide
- Phosphonous derivatives
- Phosphinous acid
- Phosphinous ester
- Phosphinous amide
- Phosphinous derivatives
- II.4 Silicon
- Quart silane
- Non-quart silane
- Silylmonohalide
- Het trialkylsilane
- Dihet dialkylsilane
- Trihet alkylsilane
- Silicic acid derivative
- II.5 Boron
- Trialkylborane
- Boric acid derivatives
- Boronic acid derivative
- Borohydride
- Quaternary boron
Part III: Some Special Patterns
- III.1 Chains
- III.2 Rings
- Aromatic
- Heterocyclic
- Epoxide
- NH aziridine
- Spiro
- Annelated rings
- Bridged rings
- III.3 Sugars and Nucleosides/Nucleotides, Steroids
- Sugar pattern 1
- Sugar pattern 2
- Sugar pattern combi
- Sugar pattern 2 reducing
- Sugar pattern 2 alpha
- Sugar pattern 2 beta
- III.4 Everything else...
- Conjugated double bond
- Conjugated tripple bond
- Cis double bond
- Trans double bond
- Mixed anhydrides
- Halogen on hetero
- Halogen multi subst
- Trifluoromethyl
- C ONS bond
- Charged
- Anion
- Kation
- Salt
- 1,3-Tautomerizable
- 1,5-Tautomerizable
- Rotatable bond
- Michael acceptor
- Dicarbodiazene
- CH-acidic
- CH-acidic strong
- Chiral center specified