Pyrido<2,3-d>pyridazinon-8;Pyrido[2,3-d]pyridazin-8(7H)-one;7H-Pyrido[2,3-d]pyridazin-8-on;7H,8H-pyrido[2,3-d]pyridazin-8-one;Pyrido<2,3-d>-pyridazin-8(7H)-on;
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