Mechanistic Implications of the Stereochemistry of the Cation Radical Diels−Alder Cycloaddition of 4-(<i>cis</i>-2-Deuteriovinyl)anisole to 1,3-Cyclopentadiene GaoDaxin BauldNathan L. 2000 Mechanistic Implications of the Stereochemistry of the Cation Radical Diels−Alder Cycloaddition of 4-(<i>cis</i>-2-Deuteriovinyl)anisole to 1,3-Cyclopentadiene