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 Keywords: 119389-05-8 OR 4-Phenylethynylphthalic Anhydride OR 4-(Phenylethynyl)phthalic anhydride OR 5-(Phenylethynyl)-2-benzofuran-1,3-dione OR 1,3-Isobenzofurandione, 5-(2-phenylethynyl)-

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