ABSTRACT
The MeOH extract of the stem barks of Drypetes tessmanniana (Euphorbiaceae) afforded two new triterpene derivatives characterized as 3beta-O-(E)-3,5-dihydroxycinnamoyl-11-oxo-olean-12-ene and 3beta,6alpha-dihydroxylup-20(29)-ene together with seven known compounds. Their structures were established on the basis of spectral analysis.
Subject(s)
Coumaric Acids/chemistry , Euphorbiaceae/chemistry , Oleanolic Acid/analogs & derivatives , Triterpenes/chemistry , Coumaric Acids/isolation & purification , Magnetic Resonance Spectroscopy , Oleanolic Acid/chemistry , Oleanolic Acid/isolation & purification , Plant Bark/chemistry , Spectrometry, Mass, Electrospray Ionization , Spectrophotometry, Infrared , Triterpenes/isolation & purificationABSTRACT
The alkaloids norchelerythrine, magnoflorine and (-)(S)-O-methylbalfourodinium cation were isolated from Zanthoxylum scandens bark collected in Vietnam, together with the flavanone glycoside hesperidin and the phenylpropanoids (E)-O-geranylconiferyl alcohol and (E)-O-geranylconiferyl alcohol (9Z, 12Z)-linoleate. This latter is a novel compound whose structure was elucidated on the basis of its spectral data and confirmed by chemical correlation.
