You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 5-amino-N-[1-(2,4-difluorophenyl)sulfanylazetidin-3-yl]-3,4-dimethylthieno[2,3-c]pyridazine-6-carboxamide .
user
C18H17F2N5OS2
assistant