You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 4-cyano-2-methyl-5-[[6-(5,6,7,8-tetrahydronaphthalen-2-yl)pyridazin-3-yl]amino]furan-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H20N4O3
assistant