Extraction and Identification of Triterpenoids from Pergularia Tomentosa L

Two new triterpenoids pergularine A and pergularine B [1], along with five known triterpenoids were isolated from the ethanolic extract of the aerial parts of P. tomentosa L. (Asclepiadaceae). The structures of the isolated known compounds were identified as 3-epi-Micromeric acid (1), taraxasterol acetate (2), taraxasterol (3), 16αhydroxytaraxasterol acetate (4) and αamyrine (5) and were reported for the first time in the genus Pergularia. Structures were elucidated by chemical and spectroscopic methods (2D-NMR, IR, and MS) and by comparison with literature data.