C6H5COOH\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOH}C6H5COOH
C6H5CH3\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}_{3}C6H5CH3
C6H6\mathrm{C}_{6} \mathrm{H}_{6}C6H6
C6H5OH\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{OH}C6H5OH