You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(4S,10S)-4,10-bis(3-fluorophenyl)-1-azatricyclo[7.3.1.05,13]trideca-5,7,9(13)-trien-7-yl]-3-propylurea is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H29F2N3O
assistant