You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-1-diphenylphosphanyl-N-[[2-[(2-diphenylphosphanylethylamino)methyl]phenyl]methyl]-3-phenylpropan-2-amine;toluene is the IUPAC name of a molecule. Please give its molecular formula.
user
C50H52N2P2
assistant