Wikipedia:  

Creatine

alpha-Methylguanidino acetic acid; N-Methyl-N-guanylglycine; Kreatin; Methylglycocyamine; Creatine; Krebiozon; N-Amidinosarcosine; Glycine, N-(aminoiminomethyl)-N-methyl-; Creatine, hydrate; (alpha-Methylguanido)acetic acid; Creatin
Molecular Formula
C4 H9 N3 O2
Natural Isotopic Abundance Mass
131.1331600000
Mono-Isotopic Molecular Masses
C12N14:   131.069476549
C13N14:   135.0828959
C12N15:   134.060581228
C13N15:   138.0740005795
Creatine image
Creatine
InCHi String:
InChI=1S/C4H9N3O2/c1-7(4(5)6)2-3(8)9/h2H2,1H3,(H3,5,6)(H,8,9)

isomeric and canonical SMILES:
CN(CC(=O)O)C(=N)N


IUPAC
2-(carbamimidoyl-methyl-amino)acetic acid

IUPAC traditional: IUPAC cas: IUPAC openeye
2-(amidino-methyl-amino)acetic acid

IUPAC systematic
2-(carbamimidoyl-methyl-amino)ethanoic acid



PubChem Substance (SID):   85164924   148804   3594
PubChem Compound (CID):   586
KEGG: Compound ID   C00300
CAS Registry IDs:   57-00-1
PDB Chemical Component   CRN
Miscellaneous Databases and IDs:   CHEBI 16919   EINECS 200-306-6   NSC 8752

Reference data were obtained primarily from the PubChem database.

Three dimensional molecular rendering uses Jmol.