show the mechanism of the following reaction: the reaction: O phthalic anhydride ANOS H₂ soa OZN C8H 5 NoG No1 + CO₂H COLH 3-Nitrophthalic acid [CH₂CD2] ₂0 Coaft Cort 0843165 NO₂ 3- Nitrophthalic anhydride

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