Q. Song, D. Billodeaux, F. Fronczek
Nov 1, 2001
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Journal
Acta Crystallographica Section E-structure Reports Online
Abstract
In the title compound, (2R,4R,5S,5aR)-rel-(−)-4-(1,3-benzodioxol-5-yl)-2,3,4,5-tetrahydro-7-methoxy-5-methyl-8H-2,5a-methano-benzoepin-8-one, C20H20O5, the tetrahydrofuran ring has an envelope conformation, and the semiquinone ring is somewhat non-planar, with deviations from coplanarity of up to 0.1603 (13) A.