Cyclic onium compounds reresented by the following structural formula (I), glucosidase inhibitors using such compounds, and antidiabetic drugs or food containing such glucosidase inhibitor. ##STR00001## wherein A.sup.- is an aniom; m is an interger between 1 and 6, n is 0 or 1, X.sup.+ is S.sup.+ or N.sup.+Q (where Q is H or an alkyl of 1 to 4 carbon atoms).

 
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< WRINKLE REDUCTION AGENT, LIPOLYSIS ACCELERATOR, COMPOSITION FOR EXTERNAL USE ON SKIN, AND FOOD OR BEVERAGE COMPOSITION

> Device for sharpening the blade of a manual cutting tool

> Pharmaceutical composition for treatment of BPH and preparation thereof

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