Acta Cryst. (2003). E59, o1244-o1245  [ doi:10.1107/S1600536803016714 ]

7,8-Dihydroxy-3-methyl-10-oxo-1H,10H-pyrano[4,3-b]chromene-9-carboxylic acid

J.-F. Wang, Y.-J. Zhang, M.-J. Fang, Y.-J. Huang, Z.-B. Wei, Z.-H. Zheng, W.-J. Su and Y.-F. Zhao

Abstract: The structure of the title compound, anhydrofulvic acid, C₁₄H₁₀O₇, a yellow acidic metabolite isolated from Paecilomyces sp. was determined by X-ray analysis. The chromone ring system is essentially planar, with the carboxylic acid group coplanar with the ring.

Online 8 August 2003

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