You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-cyclopropyl-N-[(1R,2R,3R,5R)-5-hydroxy-2-tricyclo[3.3.1.03,7]nonanyl]-2-methylpyrimidine-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H23N3O2
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