2-Propenoic acid, 3-(4-nitrophenyl)- 3-(4-Nitrophenyl)acrylic acid 3-(4-Nitrophenyl)propenoic acid 4-Nitrocinnamic acid 619-89-6 CCRIS 1665 Cinnamic acid, p-nitro- EINECS 210-617-9 NSC 2067 p-Nitrocinnamic acid