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NEW 5-VINYL-2-PYRROLIDONES, USEFUL IN PARTICULAR IN THE PREPARATION OF 4-AMINO-5-HEXENOIC AND 4-AMINO-5-HEXYNOIC ACIDS, AND THEIR PREPARATION
NEW 5-VINYL-2-PYRROLIDONES, USEFUL IN PARTICULAR IN THE PREPARATION OF 4-AMINO-5-HEXENOIC AND 4-AMINO-5-HEXYNOIC ACIDS, AND THEIR PREPARATION