(4-Nitrophenyl)vinyl ether 1-(Ethenyloxy)-4-nitrobenzene 4-Nitrophenyl vinyl ether 940-14-7 Benzene, 1-(ethenyloxy)-4-nitro- CCRIS 2897 Ether, p-nitrophenyl vinyl Vinyl p-nitrophenyl ether p-Nitrophenyl vinyl ether