A polycarbonate resin has a constitutional unit expressed by the following general formula (I): ##STR00001## A.sub.1 represents an alkyl group which is substitutional or nonsubstitutional, and an aryl group which is substitutional or nonsubstitutional. A.sub.2, A.sub.3, A.sub.4, A.sub.5, A.sub.6 and A.sub.7 each represent one of a hydrogen atom, a halogen atom, an alkyl group which has 1 to 6 carbon atoms and is substitutional or nonsubstitutional.

 
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