2H-pyrrol-2-one, 5-(4-butoxy-3-ethoxyphenyl)-1,5-dihydro-3-hydroxy-4-[(7-methoxy-2-benzofuranyl)carbonyl]-1-(2-methoxyethyl)-;5-(4-Butoxy-3-ethoxyphenyl)-3-hydroxy-4-[(7-methoxy-1-benzofuran-2-yl)carbonyl]-1-(2-methoxyethyl)-1,5-dihydro-2H-pyrrol-2-one
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