You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-amino-6-(methoxymethyl)-N-[(6-prop-2-ynoxy-1-benzofuran-2-yl)methyl]pyridine-3-carboxamide into its molecular formula.
user
C20H19N3O4
assistant