You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[N'-[2-(4,5-dimethoxypyridin-2-yl)-4-pyridin-3-ylphenyl]carbamimidoyl]-3-ethylurea into its molecular formula.
user
C22H24N6O3
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