trispiro[dibenzo[d,f][1,3,2]dioxaphosphepine-6,2'-[1,3,5,2,4,6]triazatriphosphinine-4',6''-dibenzo[d,f][1,3,2]dioxaphosphepine-6',6'''-dibenzo[d,f][1,3,2]dioxaphosphepine] (non-preferred name)
CAS No. 6800-71-1