title: Two new prenylated coumarins from Spiranthes sinensis (Pers.) Ames.
abstract: Two new prenylated coumarins, sinensins A and B, have been isolated from the roots of Spiranthes sinensis (Pers.) Ames. Their structures were elucidated as 5-gamma, gamma-dimethylallyl-8-[2-(2,6-dihydroxyphenyl)-3-dimethyl-but-2-enyol]-umbelliferon (1) and 4,6-di(gamma, gamma-dimethylallyl)-8-lavandulyl-umbelliferon (2) on the basis of spectroscopic analysis.
authors.affiliation: School of Pharmacy, Dalian Medical University, Dalian, China. jinyongpeng2005@163.com
authors.forename: Jin-Yong
authors.initials: JY
authors.lastname: Peng
authors.forename: Xu
authors.initials: X
authors.lastname: Han
authors.forename: Li-Na
authors.initials: LN
authors.lastname: Xu
authors.forename: Yan
authors.initials: Y
authors.lastname: Qi
authors.forename: You-Wei
authors.initials: YW
authors.lastname: Xu
authors.forename: Qi-Wei
authors.initials: QW
authors.lastname: Xu
mesh_terms: D003374:Coumarins / Q000737:chemistry / Q000302:isolation & purification*; D019906:Nuclear Magnetic Resonance, Biomolecular; D029595:Orchidaceae / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry; D054876:Prenylation; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D003374:Coumarins