Abstract
Bacterial decomposition of arcain proceeds by way of the intermediary substances, agmatine (l-quanido-4-amino-n-butane) and carbaminyl-agmatine (1-quanido-4-ureido-n-butane) ; the former was isolated and identified as the picrate, the latter as the dinitrate. The dinitrate, the monopicrate and the dipicrate of carbaminyl-agmatine were synthesised. Putrescine and urea are also formed in the fermentation of arcain.

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