2,4-Dodecadienoic acid, 3,7,11-trimethyl-, ethyl ester 3,7,11-Trimethyl-2,4-dodecadienoic acid ethyl ester 36557-30-9 36804-82-7 38473-62-0 Entacone Ethyl 3,7,11-trimethyldodeca-2,4-dienoate Ethyl 3,7,11-trimethyldodecene-2,4-dienoate Ethyl-3,7,11-trimethyldodeca-2,4-dienoate