Rhodenthoside A, a New Type of Acylated Secoiridoid Glycoside fromGentiana rhodentha
作者:Wei-Guang Ma、Nicola Fuzzati、Jean-Luc Wolfender、Kurt Hostettmann、Chong-Ren Yang
DOI:10.1002/hlca.19940770621
日期:1994.9.21
Investigation of the metabolites from Gentiana rhodentha FR. (Gentianaceae) by LC-UV and LC-MS resulted in the isolation and identification of a newtype of secoiridoidglycoside, rhodenthoside A (1), together with the known secoiridoids sweroside (2) and swertiamarin (3), as well as the known iridoids kingiside (4) and 8-epikingiside (5). The structures were established by 1D- and 2D-NMR, EI-MS, D/CI-MS
Synthesis of 1,5-dienes via [2 + 2] photocycloadditions between 2,5-dihydrothiophene 1,1-dioxides (sulfolenes) and .alpha.,.beta.-unsaturated cyclic ketones and anhydrides. Synthesis of 10-hydroxygeraniol
Two novel ester alkaloids, incarvines B and C, were isolated from the aerial parts of Incarvillea sinensis. On the basis of chemical and spectroscopic evidence, incarvine B was characterized as the ester of the monoterpene alkaloid, incarvilline, and the monoterpene acid, Hildebrandt's acid, whilst the structure of incarvine C was established as incarvilline 7-O-ferulate.