Ecdysteroids and a sucrose phenylpropanoid ester from Froelichia floridana |
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Authors: | Ping Wang Stacy Ownby Zhizhen Zhang Wei Yuan Wanli Zhang R Scott Beasley |
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Institution: | National Center for Pharmaceutical Crops, Arthur Temple College of Forestry and Agriculture, Stephen F. Austin State University, Nacogdoches, TX 75962, USA |
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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 IC50 of 130 μM in conjunction with low intercalation ability. |
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Keywords: | Froelichia floridana Amaranthaceae Ecdysteroid glycosides Phytoecdysteroids Sucrose phenylpropanoid ester DNA topoisomerase I |
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