You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (Z)-2-(1H-benzimidazol-2-yl)-1-(4-ethoxy-3-methoxyphenyl)-3-(1H-indol-3-yl)prop-2-en-1-one into its molecular formula.
user
C27H23N3O3
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