You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-methyl-N-(3-methyl-6,7-dihydro-[1,4]dioxino[2,3-f][1,3]benzothiazol-2-ylidene)-3-nitrobenzamide into its molecular formula.
user
C18H15N3O5S
assistant