You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[1-butyl-2-oxo-4-[3-(3-piperidin-1-ylprop-1-ynyl)phenyl]-1,8-naphthyridin-3-yl]-3-[2,6-di(propan-2-yl)phenyl]urea by IUPAC nomenclature, provide its molecular formula.
user
C39H47N5O2
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