Four new echinocystic acid 3,28-O-bisdesmosides, scaberosides Ha, Hb1, Hb2 and Hc1, were isolated as their methyl esters from the ground part of Aster scaber THUNB. (Compositae) along with foetidissimoside A and scaberoside A2, and their structures were determined based on spectral and chemical
Six new echinocystic acid 3,28-O-bisdesmosides, scaberosides Hc2, Hd, Hf, Hg, Hh and Hi, were isolated as their methyl esters from the ground part of Aster scaber THUNB. (Compositae), and their structures were determined based on spectral and chemical evidence as follows. Scaberoside Hc2 is