Tetrahydrofuran → 8-(4-chlorophenyl)-7-(pyridin-4-yl)-[1,2,4]triazolo[4,3-b]pyridazine-3,6(2H,5H)-dione

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[CH2:35]1[O:36][CH2:37][CH2:38][CH2:39]1.[CH3:25][Si:26]([O:29][Si:27]([CH3:28])([CH3:30])[CH3:31])([CH3:32])[CH3:33].[Cl:1][c:2]1[c:3](-[c:19]2[cH:20][cH:21][n:22][cH:23][cH:24]2)[c:4](-[c:12]2[cH:13][cH:14][c:15]([Cl:18])[cH:16][cH:17]2)[c:5]2[n:6]([n:7]1)[c:8](=[O:11])[nH:9][n:10]2.[K:34]>>[c:2]1(=[O:29])[c:3](-[c:19]2[cH:20][cH:21][n:22][cH:23][cH:24]2)[c:4](-[c:12]2[cH:13][cH:14][c:15]([Cl:18])[cH:16][cH:17]2)[c:5]2[n:6]([nH:7]1)[c:8](=[O:11])[nH:9][n:10]2