Acta Cryst. (2006). E62, o3725-o3727  [ doi:10.1107/S1600536806030145 ]

seco-Dukunolide F: a new tetranortriterpenoid from Lansium domesticum Corr.

H.-K. Fun, S. Chantrapromma, N. Boonnak, K. Chaiyadej, K. Chantrapromma and X.-L. Yu

Abstract: The title compound, methyl 2-[4-(3-furyl)-6b,10a-dihydroxy-3a,7,9,9-tetramethyl-6,10-dioxo-2,3,3a,6b,7,8,9,10,10a,11-decahydro-1aH,4H,6H-benzo[h][1]benzoxireno[3,2,1a-de]isochromen-8-yl]acetate, C₂₇H₃₂O₉, is a new tetranortriterpenoid which was isolated for the first time from the seeds of Lansium domesticum Coor. The four six-membered rings adopt chair, boat, envelope and screw-boat conformations. The furan substituent is planar and is attached equatorially to the lactone ring. O-HO hydrogen bonds link the molecules into chains along [100] and adjacent chains are interconnected by C-HO interactions.

Online 9 August 2006

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