Ethyl 3-amino-7,8-dihydropyrido[4,3-c]pyridazine-6(5h)-carboxylate
Ethyl 3-(methylamino)-7,8-dihydropyrido[4,3-c]pyridazine-6(5h)-carboxylate
Benzyl 3-(methylamino)-7,8-dihydropyrido[4,3-c]pyridazine-6(5h)-carboxylate
8-Chloropyrido[2,3-d]pyridazine
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