You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-[(4S,6R)-3,6-dimethyl-1-(4-methylphenyl)-7-oxo-4,8-dihydropyrazolo[3,4-e][1,4]thiazepin-4-yl]benzoic acid by IUPAC nomenclature, provide its molecular formula.
user
C22H21N3O3S
assistant