Potassium hydroxy sulfite → tert-butyl ((1S,3R)-3-((3-carbamoyl-6-(5-(methylsulfinyl)-1,3,4-oxadiazol-2-yl)pyrrolo[1,2-b]pyridazin-4-yl)amino)-1,2,2-trimethylcyclopentyl)carbamate

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[C:1]([C:4]1[CH:9]=[N:8][N:7]2[CH:10]=[C:11]([C:13]3[O:14][C:15]([S:18][CH3:19])=[N:16][N:17]=3)[CH:12]=[C:6]2[C:5]=1[NH:20][C@@H:21]1[CH2:25][CH2:24][C@@:23]([NH:27][C:28](=[O:34])[O:29][C:30]([CH3:33])([CH3:32])[CH3:31])([CH3:26])[C:22]1([CH3:36])[CH3:35])(=[O:3])[NH2:2].[OH:37]OS([O-])=O.[K+]>CC(C)=O.O.CCOC(C)=O>[C:1]([C:4]1[CH:9]=[N:8][N:7]2[CH:10]=[C:11]([C:13]3[O:14][C:15]([S:18]([CH3:19])=[O:37])=[N:16][N:17]=3)[CH:12]=[C:6]2[C:5]=1[NH:20][C@@H:21]1[CH2:25][CH2:24][C@@:23]([NH:27][C:28](=[O:34])[O:29][C:30]([CH3:33])([CH3:32])[CH3:31])([CH3:26])[C:22]1([CH3:36])[CH3:35])(=[O:3])[NH2:2]