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5-Hy-droxy-3,4',6,7-tetra-meth-oxy-flavone.

ABSTRACT: The title compound, C(19)H(18)O(7) [systematic name 5-hy-droxy-3,6,7-tri-meth--oxy-2-(4-meth-oxy-phen-yl)-4H-1-benzopyran-4-one], is a flavonoid which was isolated from the traditional Chinese medicine Laggera alata. The benzene ring of the benzopyran-one unit forms dihedral angles of 1.72?(3) and 37.39?(5)° with the pyran ring and the substituent benzene ring, respectively. The mol-ecular conformation is stabilized by an intra-molecular phenol O-H?O(ketone) hydrogen bond.

SUBMITTER: Geng HW

PROVIDER: S-EPMC3201397 | biostudies-literature | 2011 Oct

REPOSITORIES: biostudies-literature

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5-Hy-droxy-3,4',6,7-tetra-meth-oxy-flavone.

Geng Hua-Wei HW Wang Guo-Cai GC Li Guo-Qiang GQ Jiang Ren-Wang RW Li Yao-Lan YL

Acta crystallographica. Section E, Structure reports online 20110930 Pt 10

The title compound, C(19)H(18)O(7) [systematic name 5-hy-droxy-3,6,7-tri-meth--oxy-2-(4-meth-oxy-phen-yl)-4H-1-benzopyran-4-one], is a flavonoid which was isolated from the traditional Chinese medicine Laggera alata. The benzene ring of the benzopyran-one unit forms dihedral angles of 1.72 (3) and 37.39 (5)° with the pyran ring and the substituent benzene ring, respectively. The mol-ecular conformation is stabilized by an intra-molecular phenol O-H⋯O(ketone) hydrogen bond. ...[more]

PMID: 22065506

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