You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (E)-3-(3-chloro-4,5-dimethoxyphenyl)-1-(3,4-dihydro-1H-isoquinolin-2-yl)prop-2-en-1-one using the IUPAC nomenclature.
user
C20H20ClNO3
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