You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-(6,7-dihydro-5H-cyclopenta[c]pyridazin-3-yl)-N-(2-methyl-1,3-benzothiazol-5-yl)piperidine-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C21H23N5OS
assistant