You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[6-amino-1-(2-methylpropyl)-2,4-dioxopyrimidin-5-yl]-N-(2-methoxyethyl)-3-(oxolan-2-yl)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H30N4O5
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