Using C[O-], CCOP(=O)(Cc1ccc(Cn2c(Br)nc3c(N)nc(OCCOC)nc32)cc1)OCC to produce CCOP(=O)(Cc1ccc(Cn2c(OC)nc3c(N)nc(OCCOC)nc32)cc1)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.