Using Cc1nc(N)nc(N[C@H]2CC[C@H](O)CC2)c1Br, C=CC(=O)OCC to produce CCOC(=O)/C=C/c1c(C)nc(N)nc1N[C@H]1CC[C@H](O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.