1H-Azepine-1,4-dicarboxylic acid, 2,3,6,7-tetrahydro-, 1-(1,1-dimethylethyl) 4-ethyl ester
1-(1,1-Dimethylethyl) 4-ethyl 2,3,6,7-tetrahydro-1H-azepine-1,4-dicarboxylate
1-O-tert-Butyl 4-O-ethyl 2,3,6,7-tetrahydroazepine-1,4-dicarboxylate
1-tert-Butyl 4-ethyl 2,3,6,7-tetrahydro-1H-azepine-1,4-dicarboxylate