Calişkan O A, Anil H, Stephenson G R
Ege University, Faculty of Science, Organic Chemistry Department, Izmir, Turkey.
J Nat Prod. 1994 Jul;57(7):1001-3. doi: 10.1021/np50109a021.
A new bidesmosidic triterpene saponin, Cephalaria saponin A [2] was isolated from the MeOH extract of the flowers of Cephalaria transsylvanica. Its structure was determined as 3-O-([beta-D-glucopyranosyl(1-->4)-alpha-L-rhamnopyranosyl(1-->4)-beta-D -xylopyranosyl]-[28-O-beta-D-glucopyranosyl])-3 beta, 23-dihydroxy-12(13)-oleanen-28-oic acid.