You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3-chloro-4-fluorophenyl)-4-methyl-10-(oxolan-3-ylsulfonyl)-3,8-diazabicyclo[5.3.1]undeca-1(10),8-diene-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H25ClFN3O4S
assistant