The antibacterial activity reported for Surfen (bis-4-amin0-2-methyl-G-quinolylurea)~ and its low toxicity for tissues prompted an interest in the preparation of related derivatives for study as antibacterial agents. According to recent biochemical studies on the mode of action of s~ ramin,~ Antrycidej and other trypanocidal agents, o the activity does not depend upon the symmetry or the bismolecular character of the active compound. The Surfen-type ...