(11bS)-2,6-Di([1,1':3',1''-terphenyl]-5'-yl)-4-hydroxy-8,9,10,11,12,13,14,15-octahydrodinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepine 4-oxide

(11bS)-2,6-Di([1,1':3',1''-terphenyl]-5'-yl)-4-hydroxy-8,9,10,11,12,13,14,15-octahydrodinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepine 4-oxide