N2O5N_2O_5N2O5
P2O5\mathrm{P}_{2} \mathrm{O}_{5}P2O5
Cl5O5\mathrm{Cl}_{5} \mathrm{O}_{5}Cl5O5
V2O5\mathrm{V}_{2} \mathrm{O}_{5}V2O5