Using CC(C)(C)OC(=O)N1CCC(CCN2C(=O)c3cc4c(cc3C2=O)OCO4)CC1 to produce O=C1c2cc3c(cc2C(=O)N1CCC1CCNCC1)OCO3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.