Prepn: DE 615448 (1935 to Hoffmann-La Roche), C.A. 29, 62481 (1935); Pajeau, Begue, Bull. Soc. Chim. Fr. 1962, 1923. Bactericidal properties: NL 6513777; Lorah, US 3323988 (1966, 1967 both to Dow).