[Studies on chemical constituents in the roots of Rabdosia japonica (Burm.f). Hara var. glaucocalyx (Maxin) Hara]

Abstract

Objective: To isolate and elucidate the chemical constituents in the roots of Rabdosia japonica.

Method: The constituents were extracted by ether and isolated by chromatography on silica gel and ODS. The structures were determined by IR, H NMR, 13C NMR and MS spectra respectively.

Result: Four compounds were elucidated as glaucocalgxin A, oleanolic acid, ursolic acid and daucosterol.

Conclusion: Oleanolic acid and daucosterol were isolated from this plant for the first time.