1H-Pyrrole-2,5-dione, 1-[4-[1-[4-[4-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)phenoxy]phenyl]-1-(6-oxido-6H-dibenz[c,e][1,2]oxaphosphorin-6-yl)ethyl]phenyl]-
1H-Pyrrole-2,5-dione, 1-[4-[1-[4-[4-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)phenoxy]phenyl]-1-(6-oxido-6H-dibenz[c,e][1,2]oxaphosphorin-6-yl)ethyl]phenyl]-