You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-2-cyano-3-[4-[(2R)-1-(dimethylamino)-1-oxopropan-2-yl]oxy-3-ethoxyphenyl]prop-2-enoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H20N2O5
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