Spirocracolitones, CD-spiro triterpenoids from ruptiiocarpon caracolito

摘要

Six CD-spiro-triterpenoids have been isolated and identified from the methylene chloride soluble extracts of the bark of Ruptiliocarpon caracolito. The structures of these compounds, named spirocaracolitones A-F, were determined by a combination of X-ray and high field NMR studies. The spirocaracolitones represent the first examples of a class of triterpenes which have a spiro System connecting rings C and D; they also carry and unusual 12-α-methyl group.