| 摘要 |
Oxydiphthalic acid esters of formula <IMAGE> where Z is H or an alkyl group, and X is a halo radical, X' is H or a halo radical, or X and X' together represent an oxygen atom, are prepared by an esterification reaction of the corresponding halooxydiphthalic anhydride or oxydiphthalic anhydride with an alkanol.
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