2-Propenoic acid, 3-(4-methoxyphenyl)- 3-(4-Methoxyphenyl)-2-propenoic acid 4-Methoxycinnamate 4-Methoxycinnamic acid 7340-42-3 830-09-1 AI3-23399 Cinnamic acid, 4-methoxy- Cinnamic acid, p-methoxy- EINECS 212-594-0 METHOXYCINNAMIC ACID, PARA NSC 5303 P-METHOXYCINNAMIC ACID trans-4-Methoxycinnamic acid