Studies on the constituents of Momordica charantia L. IV. Characterization of the new cucurbitacin glycosides of the immature fruits. (2). Structures of the bitter glycosides, momordicosides K and L.

Abstract

The structures of momordicosides K and L, bitter principles in the fruits of Momordica charantia L. (Cucurbitaceae), were elucidated as 7-O-β-D-glucopyranosides of 3β, 7β-dihydroxy-25-methoxy-cucurbita-5, 23-dien-19-al and 3β, 7β, 25-trihydroxy-cucurbita-5, 23-dien-19-al, respectively, from spectral and chemical evidence.