2-(4-Chlor-benzolsulfonimino)-1-(4-chlor-benzolsulfonyl)-1,2-dihydro-pyridin;2-(4-Chlor-benzolsulfonylimino)-1-(4-chlor-benzolsulfonyl)-1,2-dihydro-pyridin;2-
-1--1,2-dihydro-pyridin;4-chloro-N-[1-(4-chloro-benzenesulfonyl)-1H-pyridin-2-ylidene]-benzenesulfonamide;4-chloro-N-[1-(4-chlorophenyl)sulfonylpyridin-2-ylidene]benzenesulfonamide