Gymnemic acid V, VI and VII from Gur-ma, the leaves of Gymnema sylvestre R. Br.

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From the leaves of Gymnema sylvestre were isolated three new saponins named gymnemic acid V (1), VI (2) and VII (3), besides the known saponins gypenoside II, V, XLIII, XLV, XLVII LXXIV and gynosaponin TN-2. Their structures were elucidated on the basis of spectral and chemical evidence. 1 and 2 of the three new saponins had antisweet activity.

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