(CH3)3N\left(\mathrm{CH}_{3}\right)_{3} \mathrm{N}(CH3)3N
CH3CH=CH2\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}_{2}CH3CH=CH2
(CH3)2NH\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}(CH3)2NH
CH3CH=CHCH3\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHCH}_{3}CH3CH=CHCH3