Using COC(=O)c1cc(OC2CCOc3ccccc32)c2nc(C)n(C)c2c1 to produce Cc1nc2c(OC3CCOc4ccccc43)cc(C(=O)O)cc2n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.