hydrogen butenedioate

InChI: InChI=1/C4H4O4/c5-3(6)1-2-4(7)8/h1-2H,(H,5,6)(H,7,8)/p-1/fC4H3O4/h5H/q-1

InChIKey: InChIKey=VZCYOOQTPOCHFL-LEVFODPLCY
SMILES: [H]C(=C([H])C([O-])=O)C(O)=O

Names:
    hydrogen butenedioate

Registries:
    PubChem CID 4677796
    Beilstein =5244783
    ChEBI 37155
    Gmelin 1342303