is conjugate acid of hydroxy carboxylic acid 2-hydroxy carboxylic acid 2-Hydroxy carboxylate 75.04340 C2H3O3R CHEBI:1111 CHEBI:13592 CHEBI:52618 KEGG:C02929 OC([*])C(O)=O a 2-hydroxy carboxylic acid chebi_ontology 2-hydroxy carboxylate