You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 5-(7,7-dimethyl-1-phenyl-6,8-dihydro-4H-pyrazolo[4,3-c]azepin-5-yl)-3-(1-methoxyethyl)-1,2,4-thiadiazole is given. What is its corresponding molecular formula?
user
C20H25N5OS
assistant