Sangsopha W, Lekphrom R, Schevenels FT, Kanokmedhakul K, Kanokmedhakul S. Two new bioactive triterpenoids from the roots of
Colubrina asiatica.
Nat Prod Res 2018;
34:482-488. [PMID:
30445837 DOI:
10.1080/14786419.2018.1489385]
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Abstract
Two new ceanothane triterpenes, 3,7-O,O-dibenzoyl ceanothic acid methylester (1) and 3-O-acetyl-7-O-benzoyl ceanothic acid methylester (2), along with nine known compounds (3-11), were isolated from the roots of Colubrina asiatica. The isolated compounds were identified by spectroscopic evidence. Compounds 1 and 2 showed antimalarial activity against Plasmodium falciparum with IC50 values of 4.67 and 3.07 µg/mL, respectively. Compound 2 also showed antimycobacterial activity against Mycobacterium tuberculosis (MIC 6.25 µg/mL). In addition, compounds 1, 2, 10 and 11 showed cytotoxicity against three cancer cell lines (KB, NCI-H187 and MCF-7) with IC50 values ranging from 8.32 to 46.72 µg/mL.
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