Bromide ion → Thiophene, 2-butyl-5-ethenyl

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[Br-:19].[CH2:3]([CH2:4][CH2:5][CH3:6])[c:7]1[cH:8][cH:9][c:10]([CH:12]=[O:13])[s:11]1.[CH3:15][S:16]([CH3:17])=[O:18].[CH3:20][P+:21]([c:22]1[cH:23][cH:24][cH:25][cH:26][cH:27]1)([c:28]1[cH:29][cH:30][cH:31][cH:32][cH:33]1)[c:34]1[cH:35][cH:36][cH:37][cH:38][cH:39]1.[H-:1].[Na+:2].[OH2:14]>>[CH2:3]([CH2:4][CH2:5][CH3:6])[c:7]1[cH:8][cH:9][c:10]([CH:12]=[CH2:15])[s:11]1