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Flavonoid glucuronides from Helicteres isora.

Five flavonoid glucuronides were obtained from the fruit of Helicteres isora, three of which were previously unknown compounds: isoscutellarein 4'-methyl ether 8-O-beta-D-glucuronide 6"-n-butyl ester. isoscutellarein 4'-methyl ether 8-O-beta-D-glucuronide 2", 4"-disulfate and isoscutellarein 8-O-beta-D-glucuronide 2",4"-disulfate. The structures were determined on the basis of spectroscopy and hydrolysis experiments.[1]


  1. Flavonoid glucuronides from Helicteres isora. Kamiya, K., Saiki, Y., Hama, T., Fujimoto, Y., Endang, H., Umar, M., Satake, T. Phytochemistry (2001) [Pubmed]
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