2,3-PENTADIENOIC ACID,2-METHYL,METHYL ESTER 2,3-pentadienoic acid, 2-methyl-, methyl ester InChI=1/C7H10O2/c1-4-5-6(2)7(8)9-3/h4H,1-3H methyl 2-methylpenta-2,3-dienoate