Abstract
A new naphthoquinone, solaninaphthoquione (1), and a new succinate ester derivative, 4-(4-hydroxyphenethoxy)-4-oxobutanoic acid (2), were isolated from the soil fungus Fusarium solani PSU-RSPG227 together with five previously reported compounds; javanicin (3), monaspilosin (4), aspergillol B (5), tyrosol (6) and 4-hydroxyphenylacetic acid (7). Their structures were elucidated primarily by NMR spectroscopic data. Due to paucity of materials, compounds 2, 4 and 5 as well as analogues of 5 were prepared for biological activity evaluation. Compound 1 showed significant cytotoxic activity against breast cancer (MCF-7) cells and mild cytotoxic activity against oral human carcinoma (KB) cells (IC50 values of 21.3 and 22.6μM, respectively) compared to standard compounds. Compound 1 also displayed weak antimalarial activity (IC50 of 26.1μM).
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