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  • 1
    ISSN: 1572-8854
    Keywords: zapoterin ; A,D-bis-seco limonoid ; triterpene ; casimiroa edulis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal structure of zapoterin C26H30O8 isolated from Casimiroa edulis has been determined and the compound crystallizing in the monoclinic space group P21 with a = 7.486(1), b = 16.247(3), c = 9.736(2) Å, β = 98.77(1)°, V = 1170.3(4) Å3, and Z = 2 was confirmed as 11β-hydroxyobacunone (11β-hydroxy-14,15:21,23-diepoxy-4,4,8-trimethyl-A,D-di-homo-24-nor-4,17-dioxa-chola-1,20,22-triene-3,7,16-trione) 1. The molecule comprises a tetracyclic skeleton with homo-oxa rings A and D. In the crystal, molecules form infinite ribbons along the b axis by hydrogen bonding involving the hydroxyl group and the carbonyl group of the seven-membered lactone.
    Type of Medium: Electronic Resource
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