Medicinal flowers. XXII structures of chakasaponins V and VI, chakanoside I, and chakaflavonoside a from flower buds of Chinese tea plant (Camellia sinensis)

Abstract

Two acylated oleanane-type triterpene oligoglycosides, chakasaponins V and VI, an aromatic glycoside, chakanoside I, and an acylated flavonol oligoglycoside, chakaflavonoside A, were isolated from the flower buds of Chinese tea plant [Camellia sinensis (L.) O. KUNTZE]. The chemical structures of those new glycosides were elucidated on the basis of chemical and physicochemical evidence. © 2008 Pharmaceutical Society of Japan.