[S(R)]-N-[(R)-[5-(Diphenylphosphino)-9,9-dimethyl-9H-xanthen-4-yl]phenylmethyl]-N,2-dimethyl-2-propanesulfinamide

[S(R)]-N-[(R)-[5-(Diphenylphosphino)-9,9-dimethyl-9H-xanthen-4-yl]phenylmethyl]-N,2-dimethyl-2-propanesulfinamide