[S(R)]-N-[(1S)-1-[5-(Diphenylphosphino)-9,9-dimethyl-9H-xanthen-4-yl]-2,2-dimethylpropyl]-2-methyl-2-propanesulfinamide

[S(R)]-N-[(1S)-1-[5-(Diphenylphosphino)-9,9-dimethyl-9H-xanthen-4-yl]-2,2-dimethylpropyl]-2-methyl-2-propanesulfinamide