C4H10\mathrm{C}_{4} H_{10}C4H10
C7H17\mathrm{C}_{7} \mathrm{H}_{17}C7H17
C6H14\mathrm{C}_{6} \mathrm{H}_{14}C6H14
C5H12\mathrm{C}_{5} \mathrm{H}_{12}C5H12