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Efficient process for the preparation of [S-(R,S)]-N-[1,3-benzodioxol-5-yl)butyl]-3,3-diethyl-2[4-[4-methyl-1-piper azinyl)carbonyl]phenoxy]-4-oxo-1-azetidine carboxamide, a human leukocyte elastase inhibitor

US Patent 6194569 · Granted Feb 27, 2001

Estimated economic value: $551,824,000

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