You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[[6-(diethylamino)pyridin-3-yl]methyl]-3-[[2-(morpholin-4-ylmethyl)phenyl]methyl]urea by IUPAC nomenclature, provide its molecular formula.
user
C23H33N5O2
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