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Oral absorption enhancement of carboxylic acid pharmaceuticals using (5-alkyl-2-oxo-1,3-dioxolen-4-yl)methyl ester group

  • US 4,479,947 A
  • Filed: 06/07/1982
  • Issued: 10/30/1984
  • Est. Priority Date: 07/13/1981
  • Status: Expired due to Term
First Claim
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1. The (5-alkyl-2-oxo-1,3-dioxolen-4-yl)methyl ester of a carboxylic acid wherein alkyl has 1-6 carbon atoms and wherein said carboxylic acid is cefoxitin, methyldopa, 3β

  • -[2-methoxyimino-2-(2-amino-1,3-thiazolol-4-yl)acetamido]monobactamic acid, 2-ethylthio)-6β

    -(1R-hydroxyethyl)-penem-3-carboxylic acid or fosfomycin.

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