Synonyms: tetraspiro[dibenzo[d,f][1,3,2]dioxaphosphepine-6,2'-[1,3,5,7,2,4,6,8]tetrazatetraphosphocine-4',6''-dibenzo[d,f][1,3,2]dioxaphosphepine-6',6'''-dibenzo[d,f][1,3,2]dioxaphosphepine-8',6''''-dibenzo[d,f[1,3,2]dioxaphosphepine](non-preferred name);NSC139809;AC1Q4V2U;AC1L605I;AR-1L6615;NSC-139809