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Process for the preparation of alpha-oxo-alpha-(3-alkoxycarbonyl-2,2-dimethyl-cycloprop-1-yl) methane phosphoric acid esters, intermediate products therefor and process for their preparation
Process for the preparation of 3,3-dimethyl-cyclopropane-1,1,2-tricarboxylic acid derivatives,and -halogeno-nitriles as new intermediate products for this process and their preparation