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 4-[1-[5-[1-(5-propan-2-ylthiophen-2-yl)propan-2-yl]furan-2-yl]propan-2-yl]pyridazine .
user
C21H26N2OS
assistant