You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[3-(1H-indol-3-yl)-1-oxo-1-[(1R)-1-(piperidine-1-carbonyl)spiro[1,2-dihydroindene-3,4'-piperidine]-1'-yl]butan-2-yl]-3-piperidin-3-ylurea by IUPAC nomenclature, provide its molecular formula.
user
C37H48N6O3
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