CH4\mathrm{CH}_{4}CH4
CH4OrC2H6\mathrm{CH}_{4} \mathrm{Or} \mathrm{C}_{2} \mathrm{H}_{6}CH4OrC2H6
C3H8 Or C4H10\mathrm{C}_{3} \mathrm{H}_{8} \text { Or } \mathrm{C}_{4} \mathrm{H}_{10}C3H8 Or C4H10
CH4 Or N2\mathrm{CH}_{4} \text { Or } \mathrm{N}_{2}CH4 Or N2