(2E,4Z)-hexadienoic acid methyl ester 、
(Z)-2-Ethyliden-1-methyl-3-phenylimidazolidin 在
盐酸 作用下,
生成 cis-2-Hydroxy-3,4-dimethyl-1,5-cyclohexadien-1-carbonsaeure-methylester 、 trans-2-Hydroxy-3,4-dimethyl-1,5-cyclohexadien-1-carbonsaeure-methylester 、
cis-4,5-Dimethyl-6-oxo-1-cyclohexen-1-carbonsaeure-methylester 、 trans-4,5-Dimethyl-6-oxo-1-cyclohexen-1-carbonsaeure-methylester