You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by [(9R,10E,13S)-16-carbamoyl-3-(difluoromethyl)-9-methyl-8-oxo-3,4,7-triazatricyclo[12.3.1.02,6]octadeca-1(18),2(6),4,10,14,16-hexaen-13-yl]carbamic acid ?
user
C19H19F2N5O4
assistant