C2H6\mathrm{C}_{2} \mathrm{H}_{6}C2H6
C2H5OH\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}C2H5OH
CH3OCH3\mathrm{CH}_{3} \mathrm{OCH}_{3}CH3OCH3
CH3COCH3\mathrm{CH}_{3} \mathrm{COCH}_{3}CH3COCH3