Using COc1ccc(N2CCOCC2)c2sc(NC(=O)c3ccnc(Br)c3)nc12, CC(C)O to produce COc1ccc(N2CCOCC2)c2sc(NC(=O)c3ccnc(OC(C)C)c3)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.