Author's Organization:Faculty of Pharmaceutical Sciences, Okayama University Faculty of Pharmaceutical Sciences, Okayama University Faculty of Pharmaceutical Sciences, Okayama University
The structures of chebulinic acid and chebulagic acid, which were previously formulated as dicarboxylic acids, Ib and IIb, have been revised to monocarboxylactones, Ic and IIc, respectively, on the basis of spectral and chemical evidences.