3-Cyano-5-methyl-4-(4-phenoxy-benzenesulfonyl)-pyrrolo[1,2-b]pyridazine-6-carboxylic acid ethylester
3-Cyano-5-methyl-4-(5-phenoxy-pyridin-2-ylamino)-pyrrolo[1,2-b]pyridazine-6-carboxylic acid ethyl ester
3-Cyano-4-[2-fluoro-4-(thiazol-2-yloxy)-phenylamino]-5-methyl-pyrrolo[1,2-b]pyridazine-6-carboxylic acid ethyl ester
4-[3-Chloro-4-(1-methyl-1H-imidazol-2-ylsulfanyl)-phenylamino]-3-cyano-5-methyl-pyrrolo[1,2-b]pyridazine-6-carboxylic acid ethyl ester
3-Cyano-4-[4-(cyano-phenyl-methyl)-phenylamino]-5-methyl-pyrrolo[1,2-b]pyridazine-6-carboxylic acid ethyl ester