Diethyl (4b.alpha.,4c.alpha.,9a.alpha.,9b.alpha.)-3,6-dichlorocyclobuta[1,2-b:3,4-b']bisbenzofuran-9a,9b(4bH,4cH)-dicarboxylate: the cis, syn photodimer of ethyl 5-chlorobenzofuran-2-carboxylate, an analog related to the antilipidemic drug clofibrate.

Abstract
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