This work describes the inhibitory effect of rubrofusarin (5,6-dihydroxy-8-methoxy-2-methylbenzo[g]cromen-4-one, 1) against human DNA topoisomerase II-α. The results for relaxation assays showed total inhibition of topisomerase II-α by rubrofusarin at 120 µM. This result is comparable to the one observed with etoposide as positive control. For this study, rubrofusarin was isolated from Senna macranthera var. nervosa (Voguel) Irwin & Barnebyem and characterized by spectral data, including 2D NMR, as well as its acetylated derivative.
Rubrofusarin; topoisomerase; Senna macranthera; Fabaceae
