Using CCCCCN1C(=O)C2(CC(=O)c3cc4c(cc32)OCO4)c2ccccc21 to produce CCCCCN1C(=O)C2(CCc3cc4c(cc32)OCO4)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.