You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(2S,5S)-5-[[benzyl(methyl)amino]methyl]-4-hydroxyoxolan-2-yl]-5-ethylpyrimidine-2,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H25N3O4
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