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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Studies in Mass Spectrometry. VII. Triterpenoids: Ifflaionic Acid

JS Shannon

Australian Journal of Chemistry 16(4) 683 - 689
Published: 1963

Abstract

The mass spectra of the methyl ester of the new unsaturated pentacyclic triterpenoid ifflaionic acid (urs-12-en-3-on-30-oic acid) and some of its chemical derivatives are presented. These may be used to assign position C-20 to the carbomethoxy and C-3 or C-7 to the keto group. Mechanistic proposals for, and the effect of functional groups on, the main fragmentation of the molecular ions (cleavage through ring C) are discussed.

https://doi.org/10.1071/CH9630683

© CSIRO 1963

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