You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 7-hydroxy-5-methoxy-4-methyl-6-[(E)-3-methyl-4-(2-phosphanylethylimino)but-2-enyl]-3H-2-benzofuran-1-one into its molecular formula.
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C17H22NO4P
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