(11bS,11′bS)-4,4′-[(1R)-[1,1′-Binaphthalene]-2,2′-diylbis(oxy)]bis[dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin]

(11bS,11′bS)-4,4′-[(1R)-[1,1′-Binaphthalene]-2,2′-diylbis(oxy)]bis[dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin]