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[Chemical constituents in the stem and leaf of Isodon oresbius]
1Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009. Kunming Institute of Botany, Academia Sinica, Kunming 650204.
Abstract:
Five triterpenoids were isolated from Isodon oresbius. Their structures were identified as ursolic acid, 2 alpha, 19 alpha-dihydroxy ursolic acid, 2 alpha, 3 alpha, 19 alpha-trihydroxy-12-ursen-28-oic acid, 2 alpha-hydroxy oleanolic acid and 2 alpha, 23-dihydroxy oleanolic acid by physico-chemical constants and spectral analysis.