Abstract
Two new eudesmanolide type sesquiterpenes, indicusalactone (1) and (⿿)⿿-⿿oxyfrullanolide (2), along with twelve known compounds (3⿿14), were isolated from the aerial parts of Sphaeranthus indicus. The structures of these compounds were established on the basis of their 1D and 2D NMR spectroscopic data. Compounds 1⿿4 and 12⿿14 showed antimalarial activity against Plasmodium falciparum with IC50 values ranging from 2.32 to 6.47μg/mL. In addition, compounds 2⿿5 showed cytotoxicity against cancer cell lines, KB, NCI-H187 and MCF-7 with IC50 values within the range 1.23⿿46.19μg/mL.
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