You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 6-chloro-N-[(R)-(4-fluorophenyl)-[(2S)-oxolan-2-yl]methyl]-3,4-dihydro-2H-1,5-benzodioxepine-8-carboxamide ?
user
C21H21ClFNO4
assistant