| 摘要 |
An enantiomerically enriched compound of formula (1), wherein Ar is phenyl optionally substituted with one or more groups selected from haloalkyl, alkyl and halide. This compound can be isolated in crystalline form, and used in the preparation of (+)-16-[3-trifluoromethyl)phenoxyl-17,18,19,20-tetranor PGF2.alpha., isopropyl ester.
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