Amplectol: A Novel Acetylenic Thiophene Derivative fromBlumea amplectensvar.arenaria

Abstract
The aerial parts of Blumea amplectens var. arenaria afforded taraxasteryl acetate, dihydrosterculic acid, the sesquiterpene ferutinin, and the acetylenic thiophene diol, 3,4-dihydroxy-8-[5′-methylthiophen-2′-yl]-1, 5-octadien-7-yne, named as amplectol. Thestructures were elucidated by spectroscopic methods. A biogenetic pathway for the formation of amplectol in the plant is also suggested.

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