You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N,N-dimethyl-1-[2-[(2R)-1-[(1-propylimidazol-2-yl)methyl]pyrrolidin-2-yl]pyrimidin-4-yl]methanamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H28N6
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