1949 年 69 巻 3 号 p. 129-131
On the assumption made earlier by the author that neostibosan was composed of antimonic acid and Hyden 693, condensation of diethylamine salts of p-aminophenylstibonic acid and that of antimonic acid was experimented resulting in a new complex compound. Contrary to the author's expectations, this compound was found not to be neostibosan although resembling it in several respects The new compound is very stable in its solution and contains, curiously, no diethylamine. The author, therefore, proposes a betain-like constitutional formula composed of 1mol. tri-acid of p-aminophenylstibonic acid and 4mol. antimonic acid for the compound obtained. It is assumed that the substance of unknown structure obtained by Dyson by the heating of p-aminophenylstibonic acid with HCl is identical with the complex compound obtained by the author.