2(1H)-Quinolinone, 4-(acetyloxy)-1-ethyl-3-(2-(5-nitro-2-thienyl)ethenyl)- 4-(Acetyloxy)-1-ethyl-3-(2-(5-nitro-2-thienyl)ethenyl)-2(1H)-quinolinone 74693-58-6 BRN 4579918