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Biosynthetic origins of menisporopsin A.

Menisporopsin A, produced by Menisporopsis theobromae, shows antimalarial, antimycobacterial, and cytotoxic activities. Here, we report the first (13)C incorporations at individual carbons of menisporopsin A using sodium [1-(13)C] and [2-(13)C] acetate. This result indicates that each of the subunits of the pentalactone menisporopsin A is assembled by a polyketide synthase.