X-ray crystal structures of diacetates of 6-s-cis and 6-s-trans astaxanthin and of 7,8-didehydroastaxanthin and 7,8,7′,8′-tetradehydroastaxanthin: comparison with free and protein-bound asta­xanthins

Bartalucci, G.; Fisher, S.; Helliwell, J.R.; Helliwell, M.; Liaaen-Jensen, S.; Warren, J.E.; Wilkinson, J.

doi:10.1107/S0108768109004649

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 9
Packing of (3S,3′S)-7,8,7′,8′-tetradehydroastaxanthin (3) viewed approximately down c, showing intermolecular C—H⋯O and π-stacking interactions; only H atoms involved in hydrogen bonding are shown.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 65| Part 2| March 2009| Pages 238-247

doi:10.1107/S0108768109004649

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