Abstract

<h2>Acta Crystallographica Section C</h2><h3>Crystal Structure Communications</h3><h3>0108-2701</h3> <h2>organic compounds</h2> Volume 50 Part 4 Pages 645-648 April 1994 <h2>Flavocommelin octaacetate</h2> Y. Ohsawa, S. Ohba, S. Kosemura, S. Yamamura, A. Nakagawa, K. Yoshida and T. Kondo Acta Cryst. (1994). C50, 645-648 Fiavoeommelin Octaacetate YuJI OHSAWA, SHIGERU OHBA,* SEIJI KOSEMURA AND SHOSUKE YAMAMURA Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223, Japan ATSUSHI NAKAGAWA Photon Factory, National Laboratory for High Energy Physics, Tsukuba, Ibaraki 305, Japan KUMI YOSHIDA School of Life Studies, Sugiyama Jogakuen University, Chikusa, Nagoya 464, Japan TADAO KONDO Chemical Instrument Center, Nagoya University, Chikusa, Nagoya 464-01, Japan (Received 5 April 1993; accepted 13 September 1993) Abstract Flavocommelin, 6-/3-D-glucopyranosyl-2-[4-(fl-D-glu- copyranosyloxy)phenyl]-5-hydroxy-7-methoxy-4H- 1- benzopyran-4-one, is a flavonoid component of a blue pigment, commelin, which is isolated from the petals of Commelina communis. The crystal structure of the octaacetate derivative, 5-hydroxy-7-methoxy- 6-(3,4,5,6-tetra-O-acetyl-fl-D-glucopyranosyl)-2-[4- (3,4, 5,6-tetra-O-acetyl-fl-D-glucopyranosyloxy)- phenyl]-4H-l-benzopyran-4-one, C44H48023, has been determined by X-ray diffraction. In the crystal, the molecules are arranged parallel to each other according to the periodicity of the crystal lattice. However, intermolecular stacking of the flavanone skeletons is not observed. This suggests that the © 1994 International Union of Crystallography Printed in Great Britain - all