(2,3'-Bi-1,8-naphthyridine)-4,4'(1H,1'H)-dione, 1,1'-diethyl-7,7'-dimethyl- 1,1'-Diethyl-7,7'-dimethyl-(2,3'-bi-1,8-naphthyridine)-4,4'(1H,1'H)-dione 1-Ethyl-1,4 dihydro-7-methyl-4-oxo-1,8-naphthyridine dimer 125910-12-5 Edmon dimer