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system
Provide the molecular formula for the IUPAC named substance (7Z)-7-[(2,4-dichlorophenyl)methylidene]-3-[2-(4-methoxyphenyl)ethyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one .
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C27H23Cl2NO4
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