C CHEMISTRY; METALLURGY
C07 ORGANIC CHEMISTRY
C07C ACYCLIC OR CARBOCYCLIC COMPOUNDS
59/00 Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
C07C59/235 Saturated compounds containing more than one carboxyl group
C07C59/245 containing hydroxy or O-metal groups
C07C59/265 Citric acid