CH3−CH3\mathrm{CH}_{3}-\mathrm{CH}_{3}CH3−CH3
CH3−C≡CH\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{CH}CH3−C≡CH
CH3CH2CH2OH\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}CH3CH2CH2OH
CH2=CH2\mathrm{CH}_{2}=\mathrm{CH}_{2}CH2=CH2