(E)-7-Butoxy-4-(2-(5-nitro-2-furanyl)ethenyl)-2H-1-benzopyran-2-one 2H-1-Benzopyran-2-one, 7-butoxy-4-(2-(5-nitro-2-furanyl)ethenyl)-, (E)- 68746-91-8 7-Butoxy-4-(2-(5-nitro-2-furyl)vinyl)coumarin