You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(2R)-2-hydroxy-3-(propan-2-ylamino)propoxy]-3-methyl-N-[2-(methylamino)ethyl]-1-benzofuran-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H29N3O4
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