You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(2S)-1-(N-methylanilino)-1-oxopropan-2-yl] 2-(1,3-dimethyl-2,6-dioxopurin-7-yl)acetate into its molecular formula.
user
C19H21N5O5
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