A New Glucuronide Saponin from Tea Leayes ( CameMa sinensis var . sinensisY
نویسندگان
چکیده
Saponins from the seeds of C sinensis var. sinensis (tea seed saponins) have been well investigated. Their sapogenins, theasapogenols A, B, C, D, and E, were isolated and identified by Yosioka et al.i-3) Two major tea seed saponins, theasaponins Ei and E2, have also been recently determined,4) Saponins from the leaves of C sinensis var. sinensis (tea leaf saponins) were first studied by Machida in 1938,5) and Hashizume and Sakato then demonstrated that tea leaf saponins were difTerent from tea seed saponins.6} The constituents Qf tea leaf sapoins were reported by Hashizume as fbllows: sapegenins, barringtogenol C (=theasapogenol B), camelliagenin A, R,-barrigenol, and A,-barrigenol; component sugars, glucuronic acid, galactose, xylose, and
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