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  _____    __   __    ______     ___      _____   
 |__  //   \ \\/ //  /_   _//   / _ \\   / ____|| 
   / //     \ ` //   `-| |,-   / //\ \\ / //---`' 
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 `-----`     `-`'      `-`'   `-`   `-`   `----`

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Text this: Intramolecular acylation of α-sulfinyl carbanion: a facile synthesis of (±)-pentenomycin I and (±)-epipentenomycin I.