ISSN:
1600-5759
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
In the title compound, (3′S-{3′α,3′αβ,5′αα,7′α[R*(R*)],8′bβ}-4-(2,5-dihydro-2-methyl-5-oxo-2-furanyl)-3′-(3-furanyl)-4,5,5′,5′α-tetrahydro-5,5- dimethylspiro[furan-2(3H),7′(4′H)-1H,3H-3α,8b]methanobenzo[1,2 − b:3,4 − c′]difuran)-1′-one, C25H26O7, some C—C bonds and C—C—C angles deviate significantly from their expected values. Both the terminal five-membered rings are nearly planar. The fused five-membered rings, B, C and E, have half-chair, distorted envelope and half-chair conformations, respectively. The six-membered ring is in a slightly distorted sofa conformation. The structure is stabilized by van der Waals interactions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108270195007037
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