CH3−C=N\mathrm{CH}_{3}-\mathrm{C}=\mathrm{N}CH3−C=N
CH3CH2CH3\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{3}CH3CH2CH3
CH2CH2OH\mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}CH2CH2OH
CH2CH2NH2\mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}CH2CH2NH2