A new 3α-acetoxy-urs-23,28,30-trioic acid from the leaves Acanthopanax Trifoliatus

A new 3
-acetoxy-urs-23,28,30-trioic acid, named acantrifoic acid B (1), has been isolated from the leaves of Acanthopanax trifoliatus. Its chemical structure has been characterized on the basis of spectral and chemical evidence.