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 2,6-difluoro-N-[7-hydroxy-8-(hydroxymethyl)-4a,8-dimethyl-4-[2-oxo-2-(1-phenylethylamino)ethyl]-4,5,6,7,8a,9-hexahydrobenzo[f][1,3]benzothiazol-2-yl]benzamide ?
user
C31H35F2N3O4S
assistant