You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(1H-indol-3-yl)ethyl]-3-[(3R)-1-methylpyrrolidin-3-yl]-1-(pyridin-3-ylmethyl)urea is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H27N5O
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