Acta Cryst. (2001). E57, o685-o687  [ doi:10.1107/S1600536801010078 ]

Natural diterpenoid ludongnin, octahydro-5'-hydroxy-7a-methyl-8'-methylenespiro[isobenzofuran-4(1H),4'(3'H)-[1H-7,9a]methanocyclohepta[c]pyran]-1',3,9'(3aH,4'aH)-trione

H. Shi, Y. J. Pan and Z. M. Jin

Abstract: The asymmetric unit of ludongnin consists of two molecules of C₂₀H₂₄O₆. The hydroxyl group of each molecule participates in a hydrogen bond with the carbonyl oxygen of the -lactone moiety of a translationally related molecule, thus giving rise to the two symmetry-independent sets of infinite chains in the crystal, one of which is stretched along the c and another along the a axis of the crystal.

Online 6 July 2001

Copyright © International Union of Crystallography
IUCr Webmaster