C6H5OH\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{OH}C6H5OH
C2H5OH\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}C2H5OH
CH3COOH\mathrm{CH}_{3} \mathrm{COOH}CH3COOH
H2CO3\mathrm{H}_{2} \mathrm{CO}_{3}H2CO3