1λ⁴,3λ⁴,5λ⁴,7λ⁴-Tetrathia-2,4,6,8-tetraazatricyclo[3.3.0.0^3,7]octa-1,3,5,7-tetraene

tetrasulphur dinitride

连三硫酸

Pentathionic acid

tetrasulfane