You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-(1-aminoethenyl)-5,6-dimethyl-N-[(E)-1-(2-methylprop-2-enylideneamino)prop-1-en-2-yl]pyridin-2-amine into its molecular formula.
user
C16H22N4
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