You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 2-[3-[2-[1-[3-[[9-[3-amino-6-(2-methylphenyl)pyridazin-4-yl]-1-oxa-4,9-diazaspiro[5.5]undecan-4-yl]methyl]cyclobutyl]piperidin-4-yl]ethoxy]-1,2-oxazol-5-yl]-3-methylbutanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C40H57N7O5
assistant