You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[2-(diaminomethylideneamino)oxyethyl]-2-[6-methyl-3-[(2-methyl-2-phenylpropyl)amino]-2-oxopyrazin-1-yl]acetamide into its molecular formula.
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C20H29N7O3
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