Cycloartane triterpenes from the exudate of Gardenia thailandica

Two new cycloartane triterpenes, named gardenoins I - J (1-2), were isolated from the exudate of Gardenia thailandica, along with three known compounds, secaubryenol (3), sootepin E (4) and coronaloic acid (5). The structures were elucidated on the basis of spectroscopic evidence. Their cytotoxic effect on five human tumor cell lines was examined.