title: A novel nortriterpene fromHedera rhombea.
abstract: A new nortriterpene, rhombenone (1) was isolated from the leaves ofHedera rhombea Bean (Araliaceae). The structure of this compound was established as 27-demethyl-20(S)-dammar-23-ene-6alpha,20-diol-3,25-dione on the basis of spectral analysis including HMQC and HMBC techniques. Rhombenone (1) was the first 27-demethyl nortriterpene of dammarance type isolated from natural sources.
authors.affiliation: College of Pharmacy, Ewha Womans University, 120-750, Seoul, Korea.
authors.forename: K S
authors.initials: KS
authors.lastname: Kim
authors.forename: Y H
authors.initials: YH
authors.lastname: Choi
authors.forename: I R
authors.initials: IR
authors.lastname: Lee
authors.forename: B M
authors.initials: BM
authors.lastname: Kwon
authors.forename: S H
authors.initials: SH
authors.lastname: Lee