You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
diphenyl-[(3R)-1,1,1',1'-tetramethyl-4'-[(4S)-4-phenyl-4,5-dihydro-1,3-oxazol-2-yl]-3,3'-spirobi[2H-indene]-4-yl]phosphane;(4S,5S)-2-[(3S)-4-ethyl-1,1,1',1',6,6'-hexamethyl-3,3'-spirobi[2H-indene]-4'-yl]-4,5-diphenyl-4,5-dihydro-1,3-oxazole;(4S,5S)-2-[(3S)-4-ethyl-1,1,1',1'-tetramethyl-3,3'-spirobi[2H-indene]-4'-yl]-4,5-diphenyl-4,5-dihydro-1,3-oxazole;[(3R)-1,1,1',1',6,6'-hexamethyl-4-[(4S)-4-propan-2-yl-4,5-dihydro-1,3-oxazol-2-yl]-3,3'-spirobi[2H-indene]-4'-yl]-diphenylphosphane is the IUPAC name of a molecule. Please give its molecular formula.
user
C161H168N4O4P2
assistant