You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R)-2-[[(3S)-2,3-dihydro-1,4-benzodioxin-3-yl]methylamino]-N-(methylcarbamoyl)-2-phenylacetamide into its molecular formula.
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C19H21N3O4
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