Acta Cryst. (2005). E61, o1035-o1037  [ doi:10.1107/S1600536805007725 ]

ent-(8S,10R)-15,16-Epoxy-19-norcleroda-4,11,13(16),14-tetraene-18,6(R):20,12-diolactone (isocrotocaudin)

I. M. Said, A. F. A. Noor, Y. M. Syah, J. Latif, N. Ngah and B. M. Yamin

Abstract: The title compound, C₁₉H₁₈O₅, is a diastereoisomer of crotocaudin, both being isolated from the plants of genus Croton. In isocrotocaudin, the furan moiety makes a dihedral angle with the adjacent lactone of 13.53  (17)°. The cyclohexyl ring of the diterpene moiety adopts a chair confirmation. The weak intermolecular C-HO hydrogen bonds link the molecules into linear chains along the c axis.

Online 18 March 2005

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