You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(ethylamino)-4-[[(Z)-1-[(E)-(3-hydroxy-3-methylbutan-2-ylidene)amino]prop-1-enyl]amino]-N-prop-2-enylpyrimidine-5-carboxamide into its molecular formula.
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C18H28N6O2
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