2,4-Dichlorobenzoic acid 2-(7-chloro-2H-1,4-benzothiazin-3-yl)hydrazide 78959-21-4 BRN 4715524 Benzoic acid, 2,4-dichloro-, 2-(7-chloro-2H-1,4-benzothiazin-3-yl)hydrazide