title: New diarylheptanoids from Alpinia pinnanensis.
abstract: Three new diarylheptanoids, called alpinnanins A-C (1-3), together with two known chalcones, 2',4'-dihydroxy-6'-methoxychalcone and 4',6'-dimethylchalconaringenin, two known flavanones, alpinetin and naringenin 5-O-methyl ether, a known diarylheptanoid, (3S,5S)-trans-3,5-dihydroxy-1,7-diphenyl-1-heptene, stigmasterol and beta-sitosterol as a mixture, and beta-sitosterol 3-O-beta-D-glucopyranoside were isolated from the rhizomes of Alpinia pinnanensis T. L. WU et SENJEN (Zingiberaceae). Their structures were elucidated by spectroscopic analyses.
authors.affiliation: Faculty of Chemistry, College of Natural Science, Vietnam National University, Hanoi, Vietnam.
authors.forename: Phan Minh
authors.initials: PM
authors.lastname: Giang
authors.forename: Phan Tong
authors.initials: PT
authors.lastname: Son
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Matsunami
authors.forename: Hideaki
authors.initials: H
authors.lastname: Otsuka
mesh_terms: D032429:Alpinia / Q000737:chemistry*; D002247:Carbon Isotopes; D036381:Diarylheptanoids / Q000737:chemistry* / Q000145:classification / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards; D015394:Molecular Structure; D011522:Protons; D012015:Reference Standards; D013237:Stereoisomerism
chemical_list: D002247:Carbon Isotopes; D036381:Diarylheptanoids; D011522:Protons; C507474:alpinnanin A; C507475:alpinnanin B; C507476:alpinnanin C