You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-[5-[2-(dimethylamino)ethylsulfanyl]-1,3,4-oxadiazol-2-yl]-4,4-dimethyl-1-oxopentan-2-yl]cycloheptanecarboxamide;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H37ClN4O3S
assistant