CAS 1205537-80-9 is the registry number for (R)​-3,​3'-bis[4-​tert-Butyl​phenyl]​-​5,​5',​6,​6',​7,​7',​8,​8'-​octahydro-[1,​1'-​binaphthalene]​-​2,​2'-​diol, 97%. Offered by: Fluorochem. Available pack sizes: 1g.