Using COC(=O)c1cn2ncnc(C3C(=O)Nc4ccccc43)c2c1C to produce Cc1c(C(=O)O)cn2ncnc(C3C(=O)Nc4ccccc43)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.