CH3CHO \mathrm {CH_3CHO}CH3CHO
CH3CH(OH)CH3 \mathrm {CH_3CH(OH)CH_3}CH3CH(OH)CH3
CH3COCl \mathrm {CH_3COCl}CH3COCl
CH3COCH3 \mathrm {CH_3COCH_3}CH3COCH3