1,6-Naphthyridine-2,6(5H)-dicarboxylic acid, 7,8-dihydro-, 6-(1,1-dimethylethyl) 2-methyl ester
6-(1,1-Dimethylethyl) 2-methyl 7,8-dihydro-1,6-naphthyridine-2,6(5H)-dicarboxylate
7,8-Dihydro-5H-[1,6]naphthyridine-2,6-dicarboxylic acid 6-tert-butyl ester 2-methyl ester