1994 Volume 42 Issue 11 Pages 2295-2300
The bitter constituents in the root of Cayaponia tayuya (VELL.) COGN. were investigated, and 24 29-norcucurbitacin glucosides, named cayaponosides were isolated. Among them, the structures of cayaponosides A, A3, A4, A6, B, B2, B3, B4, C, C2, C5a, D and D1 were determined based mainly on spectral analyses. They are all glucosides of 29-nor-1, 2, 3, 4, 5, 10-hexadehydrocucurbitacins, different only in side chain structure.