You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-[(1R)-1-(1,3-benzothiazol-2-yl)ethyl]-N-methyl-6-oxo-1-propylpyridazine-3-carboxamide .
user
C18H20N4O2S
assistant