Bioactive saponins and glycosides. XXVIII. New triterpene saponins, foliatheasaponins I, II, III, IV, and V, from tencha (the leaves of Camellia sinensis). - Morikawa,T.; Nakamura,S.; Kato,Y.; Muraoka,O.; Matsuda,H.; Yoshikawa,M. (Chem Pharm Bull, 2007)