is conjugate acid of is conjugate base of tartrate(2-) tartaric acid tartrate(1-) 149.07890 A 3-carboxy-2,3-dihydroxypropanoate that is the conjugate base of tartaric acid. C4H5O6 CHEBI:35397 chebi_ontology rel-(2R,3R)-3-carboxy-2,3-dihydroxypropanoate 3-carboxy-2,3-dihydroxypropanoate