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Of organic compounds,nitronic esters are a group of unusual compounds.Accordingto their chemical formula(R_1R_2C=NO_2R_3),they might be formally obtained fromcondensation of aci-nitro compounds(intronic acids)and alcohols with an equivalentamount of water eliminated.In fact,neither could nitronic esters be produced by thismethod,nor could they be hydrolyzed into nitronic acids and alcohols.Since they are