5,8-Dihydro-5-aethyl-8-oxofuro(3,2-b)(1,8)naphthyridin-7-carbonsaeure [German] 5,8-Dihydro-5-ethyl-8-oxofuro(3,2-b)(1,8)naphthyridine-7-carboxylic acid 5-Ethyl-5,8-dihydro-8-oxo-furo(3,2-b)(1,8)naphthyridine-7-carboxylic acid 73101-87-8 DJ 6783 Furo(3,2-b)(1,8)naphthyridine-7-carboxylic acid, 5,8-dihydro-5-ethyl-8-oxo- Furo(3,2-b)(1,8)naphthyridine-7-carboxylic acid, 5-ethyl-5,8-dihydro-8-oxo-