C2H6,NO\mathrm{C}_{2} \mathrm{H}_{6}, \mathrm{NO}C2H6,NO
CH4NH3\mathrm{CH}_{4} \mathrm{NH}_{3}CH4NH3
NO,CO\mathrm{NO}, \mathrm{CO}NO,CO
CO2,PH3\mathrm{CO}_{2}, \mathrm{PH}_{3}CO2,PH3