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4-Carboxylbenzocyclobutene 4-Hydroxymethylbenzocyclobutene 4-Aminobenzocyclobutene Bicyclo[1.1.1]pentane-1-carboxylic acid, methyl ester (9CI) bicyclo[3.2.1]octane-2,4-dione 5-Norbornene-2-carboxamide Bicyclo[2.2.2]octane-1,4-dimethanol Bicyclo[1.1.1]pentane-1,3-dicarboxylic acid, MonoMethyl ester bicyclo[1.1.1]pentan-1-ylmethanol Norbornane