You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[[[2-(furan-2-yl)ethylamino]-(4-phenylbutan-2-ylamino)methylidene]amino]-N,N-dimethylacetamide into its molecular formula.
user
C21H30N4O2
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