5,3 '-Dihydroxy-3,6,7,4 '-tetramethoxyflavone
ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, vol.62, 2006 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 62
- Publication Date: 2006
- Doi Number: 10.1107/s1600536806033630
- Journal Name: ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Hacettepe University Affiliated: Yes
Abstract
The title compound [systematic name: 5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-3,6,7- trimethoxychromen-4-one (casticin)], C19H18O8, was isolated from the seeds of Vitex agnus-castus L. The fused chromene ring system and the benzene ring bonded to it are close to coplanar, with a dihedral angle between their respective mean planes of 8.30 ( 12)degrees. The two hydroxy H atoms are involved in intramolecular O - (HO)-O-... hydrogen bonding. Intermolecular O - (HO)-O-... and C - (HO)-O-... hydrogen bonds and pi-pi interactions help to stabilize the crystal structure.