title: Study of constituents of Veronicastrum villosulum.
abstract: We investigated the constituents of Veronicastrum villosulum (Miquel) Yamazaki (Scrophulariaceae), an endangered species belonging to the IA group. From the aerial parts of this plant cultivated at the botanical garden of Sojo University, we isolated two new cucurbitacine-type glycosides, 3-O-alpha-L-rhamnopyranosyl-(1 --> 2)-[beta-D-glucopyranosyl-(1 --> 3)]-beta-D-glucopyranosides of 3beta,25-dihydroxycucurbit-5,23(E)-diene-7-one-25-methyl ether and 3beta,23-dihydroxycucurbit-5,24-diene-7-one-23-methyl ether.
authors.affiliation: Faculty of Pharmaceutical Sciences, Sojo University, 22-1, 4-chome, Ikeda, Kumamoto, 860-0082, Japan. none@ph.sojo-u.ac.jp
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nohara
authors.forename: Ai
authors.initials: A
authors.lastname: Nakano
authors.forename: Mona
authors.initials: M
authors.lastname: El-Aasr
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Ikeda
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Miyashita
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Yoshimitsu
authors.forename: Kotaro
authors.initials: K
authors.lastname: Murakami
mesh_terms: D035261:Plant Components, Aerial; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification*; D032264:Veronica
chemical_list: D010936:Plant Extracts