You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-(6-methoxy-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)piperidin-1-yl]-(5-methylthiophen-2-yl)methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H19N5O2S
assistant