Oriental Lacquer III. Composition of the Urushiol Fraction of the Sap of Rhus verniciflua

The urushi fraction of several samples of the sap of Rhus verniciflua was analyzed by a combination of capillary gas chromatography, supercritical fluid chromatography, high resolution NMR spectroscopy and two techniques of mass spectrometry. The composition of the urushi fraction of these samples was found to consist in general of the components that had been found by former analyses of urushi samples. Some new understanding of the components recognized gives a more accurate recognition of the ingredients of oriental lacquers. © 1994, The Society of Polymer Science, Japan. All rights reserved

Fargosides A-E, Triterpenoid Saponins from Holboellia fargesii.

Five new triterpenoid saponins, fargosides A, B, C, D, and E, were isolated from the roots of Holboellia fargesii. The structures of fargosides A-E were elucidated on the basis of chemical and physicochemical evidence and found to be 3 beta ,20 alpha -dihydroxy-29-norolean-12-en-28-oic acid 3-O-beta -D-xylopyranosyl-(1 -->2)-beta -D-glucopyranoside (1), 3 beta ,20 alpha ,24-trihydroxy-29-norolean-12-en-28-oic acid 23-O-beta -D-fucopyranosyl-(1 -->2)-[alpha -L-arabinopyranosyl-(1 -->3)]-beta-upsilon -glucopyranoside (2), 3,beta ,23-dihydroxy-30-norolean-2,20(29)-dien-28-oic acid 3-O-alpha -L-arabinopyranosyl-(1 -->2)-[beta -D-glucopyranosyluronic acid-(1 -->3)]-alpha -L-arabinopyranoside (3), 3 beta ,23-dihydroxy-30-norolean-12,20(29)-dien-28-oic acid 3-O-methyl beta -D-glucopyranosyluronate-(1 -->3)-alpha -L-arabinopyranoside (4), and 3 beta ,23-dihydroxy-olean-12-en-28-oic acid 3-O-methyl beta -D-glucopyranosyluronate-(1 -->3)-alpha -L-arabinopyranoside (5), respectively.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000170110400013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Chemistry, MedicinalChemistry, MultidisciplinaryPharmacology & PharmacySCI(E)10ARTICLE8999-10024