CH3COOH\mathrm{CH}_{3} \mathrm{COOH}CH3COOH
CH3CHCHCl\mathrm{CH}_{3} \mathrm{CHCHCl}CH3CHCHCl
C3H4\mathrm{C}_{3} \mathrm{H}_{4}C3H4
CH3CH2OH\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}CH3CH2OH
(CH3)2CH−OH\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CH}-\mathrm{OH}(CH3)2CH−OH