Polymorph of 7,8-dihydroxyflavone, and preparation method therefor
AssigneesSuzhou Glenkol Pharma Technology Co., Ltd., Quanzhou Haichuang Pharmaceutical Technology Co., Ltd.
InventorsJinhui CHEN, Peipei HUANG
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Abstract
A polymorph of 7,8-dihydroxyflavone, and a preparation method therefor is described. The polymorph of 7,8-dihydroxyflavone has significantly improved physicochemical properties, and thus has a higher medicinal value.
Claims10
A crystal form P of 7,8-dihydroxyflavone, which has an X-ray powder diffraction pattern comprising characteristic peaks at about 8.3±0.2°, 25.0±0.2°, and 25.9±0.2° expressed in 2θ angles.
A crystal form C of 7,8-dihydroxyflavone, which has an X-ray powder diffraction pattern comprising characteristic peaks at about 11.1±0.2°, 15.6±0.2°, 27.0±0.2°, and 28.3±0.2° expressed in 2θ angles.
A crystal form N of 7,8-dihydroxyflavone, which has an X-ray powder diffraction pattern comprising characteristic peaks at about 9.3±0.2°, 23.8±0.2°, 24.6±0.2°, and 26.6±0.2° expressed in 2θ angles.
Dependencies are inferred from the claim text.