28-Noroleana-16,21-diene triterpenes from Phlomis spectabilis
摘要:
Two new nortriterpenes have been isolated from Phlomis spectabilis and characterised as 28-noroleana-16,21-diene-3-alpha,19-alpha,23,29-tetrol and 28-noroleana-16,21-diene-3-alpha,19-alpha,29-triol-23-al.