New Dammarane Triterpenoids, Caffruones A–D, from the Cherries of Coffea arabica

摘要

In present study, four new dammarane-type triterpenoids, namely caffruones A–D ( 1 – 4 ), were isolated from the cherries of Coffea arabica . Their structures were elucidated by extensive spectroscopic analysis including 1D, 2D NMR (HSQC, HMBC, ~(1)H– ~(1)H COSY, and ROESY), HRMS and IR spectra. This is the first time that tetracyclic triterpenes have been reported in genus Coffea . Graphical Abstract Electronic supplementary material The online version of this article (10.1007/s13659-018-0181-y) contains supplementary material, which is available to authorized users.