3,8,16,21,28,30-hexathia-5,6,18,19-tetraaza-27,29-diazoniapentacyclo[21.3.1.1~4,7~.1~10,14~.1~17,20~]triaconta-1(27),4,6,10(29),11,13,17,19,23,25-decaene