Chembase list of 866358 unique molecular structures

2-(propane-2-sulfonyl)ethan-1-ol hydrate

$$$$ Data

M. F.

C5H14O4S

Suppliers	Catalog Number
Matrix Scientific	060474

Database	Data ID
PubChem	50998503

M. W.

170.22726

CAS

98288-49-4

Similarity

N/A

ID: 55302

1-(pyrrolidine-1-carbonyl)piperidin-4-amine hydrochloride

$$$$ Data

M. F.

C10H20ClN3O

Suppliers	Catalog Number
Matrix Scientific	060475

Database	Data ID
PubChem	50944340

M. W.

233.7383

CAS

889849-93-8

Similarity

N/A

ID: 55303

1-(2,3-dihydro-1H-inden-2-yl)piperidin-4-amine dihydrochloride

$$$$ Data

M. F.

C14H22Cl2N2

Suppliers	Catalog Number
Matrix Scientific	060476

Database	Data ID
PubChem	56773541

M. W.

289.24388

CAS

Similarity

N/A

ID: 55304

N-methylcyclopentanamine hydrochloride

$$$$ Data

M. F.

C6H14ClN

Suppliers	Catalog Number
Matrix Scientific	060477
Enamine	EN300-41281

Database	Data ID
PubChem	43810760

M. W.

135.63506

CAS

2439-56-7

Similarity

N/A

ID: 55305

2-methyl-4-(methylamino)-2H,3H,4H-1$l^{6},5,2-thieno[2,3-e][1$l^{6},2]thiazine-1...

$$$$ Data

M. F.

C8H13ClN2O2S2

Suppliers	Catalog Number
Matrix Scientific	060478

Database	Data ID
PubChem	56773542

M. W.

268.78402

CAS

Similarity

N/A

ID: 55306

[1-(propan-2-yl)piperidin-4-yl]methanol

$$$$ Data

M. F.

C9H19NO

Suppliers	Catalog Number
ChemBridge	4010731
Matrix Scientific	060479

Database	Data ID
PubChem	11147855

M. W.

157.25326

CAS

280774-03-0

Similarity

N/A

ID: 55307

{1-[(4-methylphenyl)methyl]piperidin-4-yl}methanol hydrochloride

$$$$ Data

M. F.

C14H22ClNO

Suppliers	Catalog Number
Matrix Scientific	060480

Database	Data ID
PubChem	56773543

M. W.

255.78358

CAS

Similarity

N/A

ID: 55308

{1-[(4-fluorophenyl)methyl]piperidin-4-yl}methanol hydrochloride

$$$$ Data

M. F.

C13H19ClFNO

Suppliers	Catalog Number
Matrix Scientific	060481

Database	Data ID
PubChem	56773544

M. W.

259.7474632

CAS

Similarity

N/A

ID: 55309

[1-(thiophen-2-ylmethyl)piperidin-4-yl]methanol hydrochloride

$$$$ Data

M. F.

C11H18ClNOS

Suppliers	Catalog Number
Matrix Scientific	060482

Database	Data ID
PubChem	54759138

M. W.

247.78472

CAS

926921-81-5

Similarity

N/A

ID: 55310

[1-(pyridin-2-ylmethyl)piperidin-4-yl]methanol dihydrochloride

$$$$ Data

M. F.

C12H20Cl2N2O

Suppliers	Catalog Number
Matrix Scientific	060483

Database	Data ID
PubChem	56773545

M. W.

279.206

CAS

Similarity

N/A

ID: 55311

[1-(pyridin-3-ylmethyl)piperidin-4-yl]methanol dihydrochloride

$$$$ Data

M. F.

C12H20Cl2N2O

Suppliers	Catalog Number
Matrix Scientific	060484

Database	Data ID
PubChem	54759130

M. W.

279.206

CAS

934570-59-9

Similarity

N/A

ID: 55312

ethyl 4-[(methylamino)methyl]piperidine-1-carboxylate hydrochloride

$$$$ Data

M. F.

C10H21ClN2O2

Suppliers	Catalog Number
Matrix Scientific	060485

Database	Data ID
PubChem	56773546

M. W.

236.73894

CAS

Similarity

N/A

ID: 55313

1-benzyl-3-(chloromethyl)piperidine hydrochloride

$$$$ Data

M. F.

C13H19Cl2N

Suppliers	Catalog Number
Matrix Scientific	060486

Database	Data ID
PubChem	53433579

M. W.

260.20266

CAS

104778-58-7

Similarity

N/A

ID: 55314

{1-[(4-fluorophenyl)methyl]piperidin-3-yl}methanol hydrochloride

$$$$ Data

M. F.

C13H19ClFNO

Suppliers	Catalog Number
Matrix Scientific	060487

Database	Data ID
PubChem	56773547

M. W.

259.7474632

CAS

Similarity

N/A

ID: 55315

[1-(furan-2-ylmethyl)piperidin-3-yl]methanol hydrochloride

$$$$ Data

M. F.

C11H18ClNO2

Suppliers	Catalog Number
Matrix Scientific	060488

Database	Data ID
PubChem	56773548

M. W.

231.71912

CAS

Similarity

N/A

ID: 55316

[1-(thiophen-2-ylmethyl)piperidin-3-yl]methanol hydrochloride

$$$$ Data

M. F.

C11H18ClNOS

Suppliers	Catalog Number
Matrix Scientific	060489

Database	Data ID
PubChem	56773549

M. W.

247.78472

CAS

Similarity

N/A

ID: 55317

[1-(pyridin-2-ylmethyl)piperidin-3-yl]methanol dihydrochloride

$$$$ Data

M. F.

C12H20Cl2N2O

Suppliers	Catalog Number
Matrix Scientific	060490

Database	Data ID
PubChem	56773550

M. W.

279.206

CAS

Similarity

N/A

ID: 55318

methyl(piperidin-3-ylmethyl)amine dihydrochloride

$$$$ Data

M. F.

C7H18Cl2N2

Suppliers	Catalog Number
Matrix Scientific	060491

Database	Data ID
PubChem	56773551

M. W.

201.13722

CAS

Similarity

N/A

ID: 55319

oxalic acid bis(tert-butyl 3-[(methylamino)methyl]piperidine-1-carboxylate)

$$$$ Data

M. F.

C26H50N4O8

Suppliers	Catalog Number
Matrix Scientific	060492

Database	Data ID
PubChem	56773552

M. W.

546.6972

CAS

1017356-25-0

Similarity

N/A

ID: 55320

oxalic acid bis(tert-butyl 4-(piperidin-3-ylmethyl)piperazine-1-carboxylate)

$$$$ Data

M. F.

C32H60N6O8

Suppliers	Catalog Number
Matrix Scientific	060493

Database	Data ID
PubChem	56773553

M. W.

656.8542

CAS

Similarity

N/A

ID: 55321

ethyl 3-[(4-aminopiperidin-1-yl)methyl]piperidine-1-carboxylate hydrochloride

$$$$ Data

M. F.

C14H28ClN3O2

Suppliers	Catalog Number
Matrix Scientific	060494

Database	Data ID
PubChem	56773554

M. W.

305.84402

CAS

Similarity

N/A

ID: 55322

ethyl 4-(piperazin-1-ylmethyl)piperidine-1-carboxylate dihydrochloride

$$$$ Data

M. F.

C13H27Cl2N3O2

Suppliers	Catalog Number
Matrix Scientific	060495

Database	Data ID
PubChem	56773555

M. W.

328.27838

CAS

Similarity

N/A

ID: 55323

ethyl 4-[(4-aminopiperidin-1-yl)methyl]piperidine-1-carboxylate dihydrochloride

$$$$ Data

M. F.

C14H29Cl2N3O2

Suppliers	Catalog Number
Matrix Scientific	060496

Database	Data ID
PubChem	56773556

M. W.

342.30496

CAS

Similarity

N/A

ID: 55324

3-fluoro-4-(thiomorpholin-4-yl)aniline hydrochloride

$$$$ Data

M. F.

C10H14ClFN2S

Suppliers	Catalog Number
Matrix Scientific	060497

Database	Data ID
PubChem	56773557

M. W.

248.7479632

CAS

Similarity

N/A

ID: 55325

3-fluoro-4-(4-methyl-1H-pyrazol-1-yl)aniline hydrochloride

$$$$ Data

M. F.

C10H11ClFN3

Suppliers	Catalog Number
Matrix Scientific	060498

Database	Data ID
PubChem	56773558

M. W.

227.6658432

CAS

Similarity

N/A

ID: 55326

N-[3-(aminomethyl)phenyl]methanesulfonamide hydrochloride

$$$$ Data

M. F.

C8H13ClN2O2S

Suppliers	Catalog Number
Matrix Scientific	060499
Enamine	EN300-26801

Database	Data ID
PubChem	17556792

M. W.

236.71902

CAS

Similarity

N/A

ID: 55327

6-azaspiro[3.5]nonane hydrochloride

$$$$ Data

M. F.

C8H16ClN

Suppliers	Catalog Number
Matrix Scientific	060500

Database	Data ID
PubChem	49759246

M. W.

161.67234

CAS

Similarity

N/A

ID: 55328

1-(pyrrolidin-3-yl)-1H-pyrazole dihydrochloride

$$$$ Data

M. F.

C7H13Cl2N3

Suppliers	Catalog Number
Matrix Scientific	060501

Database	Data ID
PubChem	50998518

M. W.

210.10422

CAS

Similarity

N/A

ID: 55329

2,8-diazaspiro[4.5]decan-3-one; trifluoroacetic acid

$$$$ Data

M. F.

C10H15F3N2O3

Suppliers	Catalog Number
Matrix Scientific	060502

Database	Data ID
PubChem	50998535

M. W.

268.2329096

CAS

Similarity

N/A

ID: 55330

methyl(pyridin-2-ylmethyl)amine

$$$$ Data More

M. F.

C7H10N2

Suppliers	Catalog Number
Sigma Aldrich	709336
ChemBridge	4004537
Matrix Scientific	060503

Database	Data ID
PubChem	88757

M. W.

122.1677

CAS

21035-59-6

Similarity

N/A

ID: 55331

1-methoxy-2-methylpropan-2-amine

$$$$ Data

M. F.

C5H13NO

Suppliers	Catalog Number
ChemBridge	4017683
Matrix Scientific	060504
Enamine	EN300-65971

Database	Data ID
PubChem	88666

M. W.

103.16282

CAS

20719-68-0

Similarity

N/A

ID: 55332

2-(propylsulfanyl)ethan-1-amine hydrochloride

$$$$ Data

M. F.

C5H14ClNS

Suppliers	Catalog Number
Matrix Scientific	060505

Database	Data ID
PubChem	50998511

M. W.

155.68936

CAS

36517-93-8

Similarity

N/A

ID: 55333

[2-(ethanesulfonyl)ethyl](methyl)amine hydrochloride

$$$$ Data

M. F.

C5H14ClNO2S

Suppliers	Catalog Number
Matrix Scientific	060506
Enamine	EN300-120173

Database	Data ID
PubChem	53433680

M. W.

187.68816

CAS

128696-32-2

Similarity

N/A

ID: 55334

4-[(4-methyl-1H-pyrazol-1-yl)methyl]piperidine dihydrochloride

$$$$ Data

M. F.

C10H19Cl2N3

Suppliers	Catalog Number
Matrix Scientific	060507

Database	Data ID
PubChem	50944324

M. W.

252.18396

CAS

1211465-56-3

Similarity

N/A

ID: 55335

2-(2-aminoethanesulfonyl)propane hydrochloride

$$$$ Data

M. F.

C5H14ClNO2S

Suppliers	Catalog Number
Matrix Scientific	060508

Database	Data ID
PubChem	50944337

M. W.

187.68816

CAS

320337-16-4

Similarity

N/A

ID: 55336

4-(1H-pyrazol-1-ylmethyl)piperidine dihydrochloride

$$$$ Data

M. F.

C9H17Cl2N3

Suppliers	Catalog Number
Matrix Scientific	060509

Database	Data ID
PubChem	54759129

M. W.

238.15738

CAS

956075-57-3

Similarity

N/A

ID: 55337

5-acetyl-4-methyl-1,2-dihydropyrimidin-2-one hydrochloride

$$$$ Data

M. F.

C7H9ClN2O2

Suppliers	Catalog Number
Matrix Scientific	060510

Database	Data ID
PubChem	50998526

M. W.

188.61156

CAS

Similarity

N/A

ID: 55338

bis([2-(ethylsulfanyl)ethyl](methyl)amine); oxalic acid

$$$$ Data

M. F.

C12H28N2O4S2

Suppliers	Catalog Number
Matrix Scientific	060511

Database	Data ID
PubChem	50998540

M. W.

328.49172

CAS

Similarity

N/A

ID: 55339

ethyl cyclopropanecarboximidate hydrochloride

$$$$ Data

M. F.

C6H12ClNO

Suppliers	Catalog Number
Matrix Scientific	060512

Database	Data ID
PubChem	20026660

M. W.

149.61858

CAS

63190-44-3

Similarity

N/A

ID: 55340

1-benzyl-3-(chloromethyl)pyrrolidine hydrochloride

$$$$ Data

M. F.

C12H17Cl2N

Suppliers	Catalog Number
Matrix Scientific	060513

Database	Data ID
PubChem	53433580

M. W.

246.17608

CAS

51535-01-4

Similarity

N/A

ID: 55341

3-(methylamino)propanoic acid hydrochloride

$$$$ Data

M. F.

C4H10ClNO2

Suppliers	Catalog Number
Matrix Scientific	060514
Enamine	EN300-51956

Database	Data ID
PubChem	45791941

M. W.

139.5807

CAS

2679-14-3

Similarity

N/A

ID: 55342

2-(aminomethyl)benzamide hydrochloride

$$$$ Data

M. F.

C8H11ClN2O

Suppliers	Catalog Number
Matrix Scientific	060515

Database	Data ID
PubChem	53407577

M. W.

186.63874

CAS

Similarity

N/A

ID: 55343

ethyl 1H-pyrazole-4-carboxylate

$$$$ Data More

M. F.

C6H8N2O2

Suppliers	Catalog Number
Sigma Aldrich	300780
Matrix Scientific	060516
Apollo Scientific	OR13194

Database	Data ID
PubChem	142179

M. W.

140.13992

CAS

37622-90-5

Similarity

N/A

ID: 55344

N-(2-aminoethyl)methanesulfonamide hydrochloride

$$$$ Data

M. F.

C3H11ClN2O2S

Suppliers	Catalog Number
Matrix Scientific	060517
Enamine	EN300-70207

Database	Data ID
PubChem	22609809

M. W.

174.64964

CAS

83019-89-0

Similarity

N/A

ID: 55345

(5-ethyl-1,3,4-thiadiazol-2-yl)methanamine hydrochloride

$$$$ Data

M. F.

C5H10ClN3S

Suppliers	Catalog Number
Matrix Scientific	060518

Database	Data ID
PubChem	50998533

M. W.

179.671

CAS

1126637-93-1

Similarity

N/A

ID: 55346

methyl 3-aminopropanoate hydrochloride

$$$$ Data More

M. F.

C4H10ClNO2

Suppliers	Catalog Number
Sigma Aldrich	A9515 05210
Matrix Scientific	060519
InterBioScreen	BB_NC-1738

Database	Data ID
PubChem	2734767

M. W.

139.5807

CAS

3196-73-4

Similarity

N/A

ID: 55347

1-(2-bromoethyl)-1H-imidazole hydrobromide

$$$$ Data

M. F.

C5H8Br2N2

Suppliers	Catalog Number
Matrix Scientific	060520
Enamine	EN300-115347

Database	Data ID
PubChem	50998516

M. W.

255.93842

CAS

94614-83-2

Similarity

N/A

ID: 55348

1-(2-bromoethyl)-2-methyl-1H-imidazole hydrobromide

$$$$ Data

M. F.

C6H10Br2N2

Suppliers	Catalog Number
Matrix Scientific	060521
Enamine	EN300-49695

Database	Data ID
PubChem	45791655

M. W.

269.965

CAS

82566-60-7

Similarity

N/A

ID: 55349

3-methyl-4H-1,2,4-triazol-4-amine hydrochloride

$$$$ Data

M. F.

C3H7ClN4

Suppliers	Catalog Number
Matrix Scientific	060522

Database	Data ID
PubChem	12225475

M. W.

134.56748

CAS

26601-17-2

Similarity

N/A

ID: 55350

2-(1H-imidazol-2-yl)ethan-1-amine dihydrochloride

$$$$ Data

M. F.

C5H11Cl2N3

Suppliers	Catalog Number
Matrix Scientific	060523
Enamine	EN300-73975

Database	Data ID
PubChem	13170812

M. W.

184.06694

CAS

19225-96-8

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