Wikipedia:  

DL-homocysteine

D,L-Homocysteine; (2S)-2-amino-4-sulfanylbutanoic acid; HOMO-CYS; Butyric acid, 2-amino-4-mercapto-, DL-; 2-Amino-4-Mercapto-Butyric Acid; L-Homocysteine; 2-amino-4-sulfanylbutanoic acid; dl-Homocysteine; (+-)-Homocysteine; Hcy; homocysteine
Molecular Formula
C4 H9 N O2 S
Natural Isotopic Abundance Mass
135.18476
Mono-Isotopic Molecular Masses
C12N14:   135.0353992283
C13N14:   139.0488185795
C12N15:   136.0324341215
C13N15:   140.0458534727
DL-homocysteine image
DL-homocysteine
InCHi String:
InChI=1S/C4H9NO2S/c5-3(1-2-8)4(6)7/h3,8H,1-2,5H2,(H,6,7)

canonical and isomeric SMILES:
C(CS)C(C(=O)O)N


PUBCHEM iupac NAME
2-amino-4-sulfanylbutanoic acid

PUBCHEM iupac TRADITIONAL NAME
2-amino-4-mercapto-butyric acid

PUBCHEM iupac OPENEYE NAME: PUBCHEM iupac SYSTEMATIC NAME
2-amino-4-sulfanyl-butanoic acid

PUBCHEM iupac CAS NAME
2-amino-4-mercaptobutanoic acid



PubChem Substance (SID):   85165219   8144236   46507349
PubChem Compound (CID):   778
KEGG: Compound ID   C05330
CAS Registry IDs:   6681-97-6   454-28-4   454-29-5
PDB Chemical Component   HCS
Miscellaneous Databases and IDs:   Sigma-Aldrich H4628_SIGMA   ChEBI CHEBI:17230   BioCyc HOMO-CYS   ChemIDplus 000454295   ChemSpider 13860132   EINECS 207-222-9   NIST 1709797319   CambridgeSoft Corporation 4510   DrugBank DB04422   ChemDB 6681976

Reference data were obtained primarily from the PubChem database.

Three dimensional molecular rendering uses Jmol.