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1. CH3-CO-CH2-CH2-COOH+2[H]--> CH3-CO-CH2-CH2-COOH+NH3--> CH3-CO-CH2-CH2-COOH+NaHSO3--> CH3-CO-CH2-CH2-COOH+PCl5(изб.)--> 2. COOH-(CH2)5-COOH--(2PCl5)-->A--(2NH3)-->B--(P2O5)-->C--(2H2O)-->D. Заранее спасибо.