You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-[1-ethyl-3-(6-methoxypyridin-3-yl)-4,5-dihydropyrazolo[4,3-g][1,3]benzothiazol-7-yl]acetamide ?
user
C18H19N5O2S
assistant