Title: Terpenes from Mikania aff. jeffreyi (Asteraceae)
Abstract: Ten terpenes, three steroids and one flavone have been isolated from the leaves of Mikania aff. jeffreyi, Asteraceae. Among them there are two new kaurane and one new bis-norlabdane diterpene derivatives. The kaur-16-en-18-oic acid, 4-epi-kaurenoic acid, is predominant in the plant leaves. The structures were elucidated by spectroscopic analysis.