| 摘要 |
A N-acetylneuraminic acid salt of formula (I), useful as an expectorant, is prepd. by neutralizing N-acetylneuraminic acid with hydroxide of alkali metal or alkali earth metal, its carbonate, organic ammonium or organic amine. In (I), when n is 1, Z is H, Li, K, Na, NH4, organic ammonium or organic amine; and when n is 2, Z is Ca, Ba or Mg. (I) promotes a direct ciliary motion and affects rheological properties of sputum.
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