4 O = O; { Oxygen atomic ground state }
5 O1D = O; { Oxygen atomic excited state }
6 O3 = O + O + O; { Ozone }
7 NO = N + O; { Nitric oxide }
8 NO2 = N + O + O; { Nitrogen dioxide }
12 M = O + O + N + N;{ Atmospheric generic molecule }
13 O2 = O + O; { Molecular oxygen }