1-Hydroxy-2,3,4,7-tetramethoxyxanthone from Swertia Chirayita
Run-Hua Lu, e-mail: [email protected]
Abstract
The title compound, 1-hydroxy-2,3,4,7-tetramethoxy-9H-xanthen-9-one, C17H16O7, was isolated from Swertia Chirayita and is found to be planar with only two of the methoxy substituents lying out of the plane of the molecule.
