H2C=CH2\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}_{2}H2C=CH2
CH3−CH2−OH\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{OH}CH3−CH2−OH
(CH3−CH2)2O\left(\mathrm{CH}_{3}-\mathrm{CH}_{2}\right)_{2} \mathrm{O}(CH3−CH2)2O
CH3−CH3\mathrm{CH}_{3}-\mathrm{CH}_{3}CH3−CH3
