Chembase list of 866358 unique molecular structures

2-amino-4H,5H,6H-cyclopenta[b]thiophene-3-carboxamide

$$$$ Data

M. F.

C8H10N2OS

Suppliers	Catalog Number
ChemBridge	3000477
Matrix Scientific	010726
Enamine	EN300-02286

Database	Data ID
PubChem	596881

M. W.

182.2428

CAS

77651-38-8

Similarity

N/A

ID: 13302

1-(thiophene-2-carbonyl)piperidine-4-carboxylic acid

$$$$ Data

M. F.

C11H13NO3S

Suppliers	Catalog Number
ChemBridge	3002343
Matrix Scientific	010727
Enamine	EN300-13024

Database	Data ID
PubChem	760311

M. W.

239.29082

CAS

147636-34-8

Similarity

N/A

ID: 13303

1-(3,4-dimethoxybenzoyl)piperidine-4-carboxylic acid

$$$$ Data

M. F.

C15H19NO5

Suppliers	Catalog Number
ChemBridge	7359346
Matrix Scientific	010728

Database	Data ID
PubChem	719136

M. W.

293.31506

CAS

510739-78-3

Similarity

N/A

ID: 13304

1-(2-methylbenzoyl)piperidine-4-carboxylic acid

$$$$ Data

M. F.

C14H17NO3

Suppliers	Catalog Number
ChemBridge	7358637
Matrix Scientific	010729
Enamine	EN300-09309

Database	Data ID
PubChem	754891

M. W.

247.28968

CAS

401581-31-5

Similarity

N/A

ID: 13305

1-(4-methoxybenzoyl)piperidine-4-carboxylic acid

$$$$ Data

M. F.

C14H17NO4

Suppliers	Catalog Number
ChemBridge	7360927
Matrix Scientific	010730
Key Organics	8X-0705

Database	Data ID
PubChem	738124

M. W.

263.28908

CAS

510739-83-0

Similarity

N/A

ID: 13306

1-(2-phenylacetyl)piperidine-4-carboxylic acid

$$$$ Data

M. F.

C14H17NO3

Suppliers	Catalog Number
ChemBridge	7358106
Matrix Scientific	010731

Database	Data ID
PubChem	280747

M. W.

247.28968

CAS

26965-32-2

Similarity

N/A

ID: 13307

1-(4-methylbenzoyl)piperidine-4-carboxylic acid

$$$$ Data

M. F.

C14H17NO3

Suppliers	Catalog Number
ChemBridge	7355706
Matrix Scientific	010732

Database	Data ID
PubChem	778074

M. W.

247.28968

CAS

401581-34-8

Similarity

N/A

ID: 13308

1-(4-fluorobenzoyl)piperidine-4-carboxylic acid

$$$$ Data

M. F.

C13H14FNO3

Suppliers	Catalog Number
ChemBridge	7353401
Matrix Scientific	010733
Enamine	EN300-09032

Database	Data ID
PubChem	778075

M. W.

251.2535632

CAS

139679-45-1

Similarity

N/A

ID: 13309

1-(2-chlorobenzoyl)piperidine-4-carboxylic acid

$$$$ Data

M. F.

C13H14ClNO3

Suppliers	Catalog Number
ChemBridge	7357149
Matrix Scientific	010734

Database	Data ID
PubChem	778084

M. W.

267.70816

CAS

352673-16-6

Similarity

N/A

ID: 13310

1-[(3-methylcyclohexyl)amino]propan-2-ol

$$$$ Data

M. F.

C10H21NO

Suppliers	Catalog Number
Matrix Scientific	010735

Database	Data ID
PubChem	3151936

M. W.

171.27984

CAS

Similarity

N/A

ID: 13311

1-{[(3-methylthiophen-2-yl)methyl]amino}propan-2-ol hydrochloride

$$$$ Data

M. F.

C9H16ClNOS

Suppliers	Catalog Number
Matrix Scientific	010736

Database	Data ID
PubChem	17308996

M. W.

221.74744

CAS

Similarity

N/A

ID: 13312

1-{[(2-fluorophenyl)methyl]amino}propan-2-ol; oxalic acid

$$$$ Data

M. F.

C12H16FNO5

Suppliers	Catalog Number
Matrix Scientific	010737

Database	Data ID
PubChem	45074837

M. W.

273.2575432

CAS

Similarity

N/A

ID: 13313

1-{[(3,4-dimethoxyphenyl)methyl]amino}propan-2-ol; oxalic acid

$$$$ Data

M. F.

C14H21NO7

Suppliers	Catalog Number
Matrix Scientific	010738

Database	Data ID
PubChem	45074838

M. W.

315.31904

CAS

Similarity

N/A

ID: 13314

1-[(naphthalen-1-ylmethyl)amino]propan-2-ol hydrochloride

$$$$ Data

M. F.

C14H18ClNO

Suppliers	Catalog Number
Matrix Scientific	010739

Database	Data ID
PubChem	9549578

M. W.

251.75182

CAS

Similarity

N/A

ID: 13315

1-[(2-methylpropyl)amino]propan-2-ol

$$$$ Data

M. F.

C7H17NO

Suppliers	Catalog Number
Matrix Scientific	010740
InterBioScreen	BB_SC-1141

Database	Data ID
PubChem	2772036

M. W.

131.21598

CAS

Similarity

N/A

ID: 13316

3-{[(2-fluorophenyl)methyl]amino}propan-1-ol

$$$$ Data

M. F.

C10H14FNO

Suppliers	Catalog Number
Matrix Scientific	010741

Database	Data ID
PubChem	3151938

M. W.

183.2226632

CAS

Similarity

N/A

ID: 13317

3-{[(3-methylthiophen-2-yl)methyl]amino}propan-1-ol hydrochloride

$$$$ Data

M. F.

C9H16ClNOS

Suppliers	Catalog Number
Matrix Scientific	010742

Database	Data ID
PubChem	45074839

M. W.

221.74744

CAS

Similarity

N/A

ID: 13318

[(3-methylthiophen-2-yl)methyl][3-(morpholin-4-yl)propyl]amine hydrochloride

$$$$ Data

M. F.

C13H23ClN2OS

Suppliers	Catalog Number
Matrix Scientific	010743

Database	Data ID
PubChem	45074840

M. W.

290.85252

CAS

Similarity

N/A

ID: 13319

5-(4-chlorophenoxymethyl)-1,3,4-thiadiazol-2-amine

$$$$ Data

M. F.

C9H8ClN3OS

Suppliers	Catalog Number
Matrix Scientific	010744
InterBioScreen	BB_SC-6139

Database	Data ID
PubChem	747906

M. W.

241.69732

CAS

Similarity

N/A

ID: 13320

5-[(3,4-dimethoxyphenyl)methyl]-1,3,4-thiadiazol-2-amine

$$$$ Data

M. F.

C11H13N3O2S

Suppliers	Catalog Number
ChemBridge	5483675
Matrix Scientific	010745
InterBioScreen	BB_SC-6140

Database	Data ID
PubChem	740440

M. W.

251.30482

CAS

313957-85-6

Similarity

N/A

ID: 13321

2-chloro-N-(2-methyl-1H-1,3-benzodiazol-6-yl)acetamide

$$$$ Data

M. F.

C10H10ClN3O

Suppliers	Catalog Number
Matrix Scientific	010746

Database	Data ID
PubChem	1078898

M. W.

223.6589

CAS

Similarity

N/A

ID: 13322

2-chloro-N-(6-chloro-1,3-benzothiazol-2-yl)acetamide

$$$$ Data

M. F.

C9H6Cl2N2OS

Suppliers	Catalog Number
Matrix Scientific	010747
Life Chemicals	F3308-4054

Database	Data ID
PubChem	763236

M. W.

261.12774

CAS

Similarity

N/A

ID: 13323

N-(1-benzyl-3,5-dimethyl-1H-pyrazol-4-yl)-2-chloroacetamide hydrochloride

$$$$ Data

M. F.

C14H17Cl2N3O

Suppliers	Catalog Number
Matrix Scientific	010748

Database	Data ID
PubChem	45074841

M. W.

314.21028

CAS

Similarity

N/A

ID: 13324

3-amino-4-(4-methylpiperidin-1-yl)benzamide

$$$$ Data

M. F.

C13H19N3O

Suppliers	Catalog Number
Matrix Scientific	010749

Database	Data ID
PubChem	969538

M. W.

233.30946

CAS

Similarity

N/A

ID: 13325

5-amino-2-(4-methylpiperidin-1-yl)benzamide

$$$$ Data

M. F.

C13H19N3O

Suppliers	Catalog Number
Matrix Scientific	010750

Database	Data ID
PubChem	846188

M. W.

233.30946

CAS

Similarity

N/A

ID: 13326

3-chloro-4-(4-methylpiperidin-1-yl)aniline

$$$$ Data

M. F.

C12H17ClN2

Suppliers	Catalog Number
Matrix Scientific	010751
InterBioScreen	BB_SC-0895

Database	Data ID
PubChem	937604

M. W.

224.72978

CAS

Similarity

N/A

ID: 13327

3-chloro-2-(morpholin-4-yl)aniline

$$$$ Data More

M. F.

C10H13ClN2O

Suppliers	Catalog Number
ChemBridge	4012422
Matrix Scientific	010752
InterBioScreen	BB_SC-2478

Database	Data ID
PubChem	952393

M. W.

212.67602

CAS

58785-07-2

Similarity

N/A

ID: 13328

5-chloro-2-(piperidin-1-yl)aniline

$$$$ Data

M. F.

C11H15ClN2

Suppliers	Catalog Number
Matrix Scientific	010753

Database	Data ID
PubChem	285317

M. W.

210.7032

CAS

Similarity

N/A

ID: 13329

5-chloro-2-(morpholin-4-yl)aniline

$$$$ Data

M. F.

C10H13ClN2O

Suppliers	Catalog Number
Matrix Scientific	010754
InterBioScreen	BB_SC-2479

Database	Data ID
PubChem	846189

M. W.

212.67602

CAS

90875-44-8

Similarity

N/A

ID: 13330

2-[(6-amino-9H-purin-8-yl)sulfanyl]butanoic acid

$$$$ Data

M. F.

C9H11N5O2S

Suppliers	Catalog Number
Matrix Scientific	010755

Database	Data ID
PubChem	2772435

M. W.

253.28094

CAS

Similarity

N/A

ID: 13331

(prop-2-en-1-yl)(prop-2-yn-1-yl)amine hydrochloride

$$$$ Data

M. F.

C6H10ClN

Suppliers	Catalog Number
Matrix Scientific	010756

Database	Data ID
PubChem	45074842

M. W.

131.6033

CAS

Similarity

N/A

ID: 13332

[(2-chlorophenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C14H21ClN2O

Suppliers	Catalog Number
Matrix Scientific	010757

Database	Data ID
PubChem	2990725

M. W.

268.78234

CAS

Similarity

N/A

ID: 13333

[(4-tert-butylphenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C18H30N2O

Suppliers	Catalog Number
Matrix Scientific	010758

Database	Data ID
PubChem	3152140

M. W.

290.4436

CAS

Similarity

N/A

ID: 13334

(cyclohex-3-en-1-ylmethyl)[3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C14H26N2O

Suppliers	Catalog Number
Matrix Scientific	010759

Database	Data ID
PubChem	3152141

M. W.

238.36904

CAS

Similarity

N/A

ID: 13335

[(2,4-dimethoxyphenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C16H26N2O3

Suppliers	Catalog Number
Matrix Scientific	010760

Database	Data ID
PubChem	2992212

M. W.

294.38924

CAS

Similarity

N/A

ID: 13336

[3-(morpholin-4-yl)propyl]({[4-(propan-2-yl)phenyl]methyl})amine

$$$$ Data

M. F.

C17H28N2O

Suppliers	Catalog Number
Matrix Scientific	010761
InterBioScreen	BB_SC-4433

Database	Data ID
PubChem	2985855

M. W.

276.41702

CAS

Similarity

N/A

ID: 13337

[(4-ethylphenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C16H26N2O

Suppliers	Catalog Number
Matrix Scientific	010762

Database	Data ID
PubChem	2985278

M. W.

262.39044

CAS

Similarity

N/A

ID: 13338

[(4-methoxyphenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C15H24N2O2

Suppliers	Catalog Number
Matrix Scientific	010763
InterBioScreen	BB_SC-4231

Database	Data ID
PubChem	3152142

M. W.

264.36326

CAS

Similarity

N/A

ID: 13339

[(4-fluorophenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C14H21FN2O

Suppliers	Catalog Number
Matrix Scientific	010764

Database	Data ID
PubChem	2985913

M. W.

252.3277432

CAS

Similarity

N/A

ID: 13340

[(4-chlorophenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C14H21ClN2O

Suppliers	Catalog Number
Matrix Scientific	010765

Database	Data ID
PubChem	2990772

M. W.

268.78234

CAS

Similarity

N/A

ID: 13341

[(3-chlorophenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C14H21ClN2O

Suppliers	Catalog Number
Matrix Scientific	010766

Database	Data ID
PubChem	2991571

M. W.

268.78234

CAS

Similarity

N/A

ID: 13342

[(3-fluorophenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C14H21FN2O

Suppliers	Catalog Number
Matrix Scientific	010767

Database	Data ID
PubChem	3152143

M. W.

252.3277432

CAS

Similarity

N/A

ID: 13343

[(2-methoxyphenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C15H24N2O2

Suppliers	Catalog Number
Matrix Scientific	010768

Database	Data ID
PubChem	2990524

M. W.

264.36326

CAS

Similarity

N/A

ID: 13344

[(3-methoxyphenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C15H24N2O2

Suppliers	Catalog Number
Matrix Scientific	010769

Database	Data ID
PubChem	3152144

M. W.

264.36326

CAS

Similarity

N/A

ID: 13345

[(2-ethoxyphenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C16H26N2O2

Suppliers	Catalog Number
Matrix Scientific	010770

Database	Data ID
PubChem	3152145

M. W.

278.38984

CAS

Similarity

N/A

ID: 13346

[(4-ethoxyphenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C16H26N2O2

Suppliers	Catalog Number
Matrix Scientific	010771

Database	Data ID
PubChem	2992508

M. W.

278.38984

CAS

Similarity

N/A

ID: 13347

[(2-methylphenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C15H24N2O

Suppliers	Catalog Number
Matrix Scientific	010772

Database	Data ID
PubChem	2987612

M. W.

248.36386

CAS

Similarity

N/A

ID: 13348

[(3-methylphenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C15H24N2O

Suppliers	Catalog Number
Matrix Scientific	010773

Database	Data ID
PubChem	3152146

M. W.

248.36386

CAS

Similarity

N/A

ID: 13349

[(4-methylphenyl)methyl][3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C15H24N2O

Suppliers	Catalog Number
Matrix Scientific	010774

Database	Data ID
PubChem	2950949

M. W.

248.36386

CAS

Similarity

N/A

ID: 13350

benzyl[3-(morpholin-4-yl)propyl]amine

$$$$ Data

M. F.

C14H22N2O

Suppliers	Catalog Number
Matrix Scientific	010775

Database	Data ID
PubChem	206108

M. W.

234.33728

CAS

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