2-ethoxymethyl-5-hydroxy-gamma-pyrone and melanogenesis-inhibiting endermic preparation containing the same as active ingredient
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United States of America Patent
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Apr 7, 1992
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N/A
app pub date -
Sep 5, 1990
filing date -
Sep 14, 1989
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Expired
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Abstract
The compound 2-ethoxymethyl-5-hydroxy-.gamma.-pyrone and a melanogenesis-inhibiting endermic preparation for external application containing the compound as an active ingredient. The endermic preparations are almost non-toxic and have an extremely high melanogenesis-inhibiting activity.
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