1-ethyl-1,4-dihydro-4-oxo[1,3]dioxolo[4,5-g]cinnoline-3-carbonitrile

1-Ethyl-3-cyano-6,7-methylenedioxy-4-cinnolone is an intermediate used in the synthesis of Cinoxacin (C475700), which is an antibacterial quinolone previously known for its use in the treatment of urinary tract infections.