Using COC(=O)c1cc(CC=C(C)C)c(OC)cc1O, CC(C)(C)OC(=O)NCCO to produce COC(=O)c1cc(CC=C(C)C)c(OC)cc1OCCNC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.