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 [(1R,3S,4S,5S,8S,12R)-7-[4-cyano-3-(trifluoromethyl)phenyl]-4-methyl-6-oxo-9,13-dioxa-7-azatetracyclo[6.3.1.11,4.05,12]tridecan-3-yl]-methylcarbamic acid ?
user
C21H20F3N3O5
assistant