THE DISSOCIATION CONSTANTS OF 1-ACETAMIDO PROPYLIDENE- 1,1-DIPHOSPHONIC ACID AND 1-PROPIONAMIDO ETHY

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<正> The Gem-Diphosphonic acids are a kind of multiple usage chelating agents. 1-acetamido propylidene-1,1-diphishonic acid (S-186) and 1-propoinamido ethylidene-1,1-diphosphonic acid (S-106) were first made by the Shanghai In-
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