Wikipedia:  

Fumaric acid

Fumaric acid; Fumarate; trans-Butenedioic acid
Molecular Formula
C4 H4 O4
Natural Isotopic Abundance Mass
116.0721600000
Mono-Isotopic Molecular Masses
C12N14:   116.010958617
C13N14:   120.024377968
C12N15:   116.010958617
C13N15:   120.024377968
Fumaric acid image
Fumaric acid
InCHi String:
InChI=1S/C4H4O4/c5-3(6)1-2-4(7)8/h1-2H,(H,5,6)(H,7,8)/b2-1+

isomeric SMILES:
C(=C\C(=O)O)/C(=O)O
canonical SMILES:
C(=CC(=O)O)C(=O)O


IUPAC
but-2-enedioic acid



PubChem Substance (SID):   85164926   3422   741990
PubChem Compound (CID):   444972   164547   5460307
KEGG: Compound ID   C00122
CAS Registry IDs:   110-17-8
PDB Chemical Component   FMR   FUM
Miscellaneous Databases and IDs:   CHEBI 29806

Reference data were obtained primarily from the PubChem database.

Three dimensional molecular rendering uses Jmol.