A new geranyl flavanone from Macaranga triloba.

A new geranyl flavanone, 2'-hydroxy-macarangaflavnone A (1), and a known 4',7-dihydroxy-8-methylflavan were isolated from the leaves of Macaranga triloba (Euphorbiceae). The structure of 1 was elucidated based on spectroscopic methods, including 1D and 2D NMR analysis.

Sweet pregnane glycosides from Telosma procumbens.

An intensely sweet polyoxypregnane glycoside, telosmoside A15 (15), was isolated from an Asian Asclepiadaceae plant, Telosma procumbens, collected in Vietnam. This is the first time a sweet pregnane glycoside has been found, and its sweetness intensity is 1000 times greater than that of sucrose. From the same plant, 17 other new glycosides were isolated, having the same aglycone; they are named telosmosides A1-A14 (1-14) and A16-A18 (16-18).