54867-56-0 6-Butyl-1,4,7,10-tetrahydro-4,10-dioxo-1,7-phenanthroline-2,8-dicarbonsaeure 6-Butyl-1,4,7,10-tetrahydro-4,10-dioxo-1,7-phenanthroline-2,8-dicarboxylic acid Bufrolin Bufrolin [BAN:INN] Bufroline [INN-French] Bufrolino [INN-Spanish] Bufrolinum [INN-Latin]