Using CCc1c(OC)nc2nc(C(=O)C#CCOC3CCCCO3)c(Br)n2c1C to produce CCc1c(OC)nc2nc(C(=O)C#CCO)c(Br)n2c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.