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Abstract 2‐Methyl‐5‐(5‐oxo‐1‐benzyl‐2‐pyrrolidinyl)‐1,3,4‐oxadiazole is easily obtained by dehydration of N‐acetyl‐1‐benzylpyroglutamic acid hydrazide with a methanesulfonic acid/phosphoric anhydride mixture.
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Rigo et al. (1986) studied this question.
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