A new triterpene From Uncaria macrophylla and its antitumor activity.

On our ongoing investigation, a new oleanolic triterpene, 3β,6β,19α-trihydroxy-12-oleanen-28-oic acid (1) was obtained from the chloroform-soluble portion of the 90% alcohol-water extract of the stem bark of Uncaria macrophylla. Its structure was elucidated by extensive spectroscopic methods, including 1D and 2D ((1)H-(1)H COSY, HSQC and HMBC) NMR and HR… CONTINUE READING