C12H24 N6O3\mathrm{C}_{12} \mathrm{H}_{24} \mathrm{~N}_{6} \mathrm{O}_{3}C12H24 N6O3
C6H8N2O2\mathrm {C_6H_8N_2O_2 }C6H8N2O2
C8H16N4O2\mathrm {C_8H_{16}N_4O_2 }C8H16N4O2
C8H16N2O2\mathrm {C_8H_{16}N_2O_2}C8H16N2O2