131420-91-2 2-Propenoic acid, 3-(4-(acetyloxy)-5-ethyl-3-methoxy-1-naphthalenyl)-2-methyl-, (Z)- 3-(4-(Acetyloxy)-5-ethyl-3-methoxy-1-naphthalenyl)-2-methyl-2-propenoic acid E 5090 E-5090 E5090