Ecdysteroids and a sucrose phenylpropanoid ester from Froelichia floridana

Author(s): Wang P, Li S, Ownby S, Zhang Z, Yuan W, et al.

Abstract

Phytoecdysteroid glycosides (1-5) and a phenylpropanoid ester of sucrose (6) were isolated from the whole plant of Froelichia floridana, along with eight known compounds including three ecdysteroids (7-9), four flavonoids (10-13), and one phenolic compound (14). Structures were determined using a combination of spectroscopic techniques. Compounds 1, 2 and 6-14 were tested in vitro for their activity against human DNA topoisomerase I. Compound 13 (diosmetin) showed marginal inhibition against topoisomerase I with IC(50) of 130 microM in conjunction with low intercalation ability.

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