You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-benzyl-4-[(Z)-(3,4-dimethoxy-5-nitrophenyl)methylideneamino]-1H-1,2,4-triazole-5-thione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H17N5O4S
assistant