ABSTRACT
The aerial parts of Baccharis pingraea, collected in Chile, afforded, in addition to two diterpene glycosides isolated previously, 14 new ones and two of the corresponding desacyl aglycones. The structures were elucidated by high field 1H NMR spectroscopy. The differences between the collections from Argentina and Chile are discussed.
Subject(s)
Glycosides/isolation & purification , Plants/analysis , Glycosides/chemistryABSTRACT
The investigation of the roots and aerial parts of EUPATORIUM CANNABIUM afforded, in addition to the sesquiterpene lactones eupatolide, eupatoriopicrin, and eucannabinolide isolated previously, eight further lactones, three of which are new. Furthermore, in addition to known compounds, a new clerodane derivative and two further tremetone derivatives as well as 10-acetoxyneryl acetate were isolated.
ABSTRACT
The aerial parts of JUNGIA SETERIANA afforded in addition to known compounds two pairs of isomeric C (17)-acetylenes which differ in the number of triple bonds and in the configuration of the 9,10-double bond. The structures and configurations followed from the UV and the (1)H-NMR spectra, especially from those of the corresponding ketones, which were obtained by manganese dioxide oxidation.
ABSTRACT
Die oberirdischen Teile von WYETHIA ARIZONICA enthalten neben bekannten Verbindungen zwei Aromadendren-Derivate, deren Strukturen durch eingehende spektroskopische Untersuchungen sowie durch Partialsynthese gesichert werden.
