Using CC(C)(C)OC(=O)N1CCN2CC(O)(c3ccc4c(c3)CCOC4=O)OC[C@@H]2C1 to produce O=C1OCCc2cc([C@@H]3CN4CCNC[C@H]4CO3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.