1,1'-[(5aR,8aR,14aR)-5a,6,7,8,8a,9-Hexahydro-5H-[1]benzopyrano[3,2-d]xanthene-1,13-diyl]bis[1,1-diphenyl-phosphine]
1,1'-[(5aR,8aR,14aR)-5a,6,7,8,8a,9-Hexahydro-5H-[1]benzopyrano[3,2-d]xanthene-1,13-diyl]bis[1,1-di(3,5-dimethylphenylphosphine
