Using COC(=O)c1ccc(C(=O)Nc2cc3c4c(c2)CCCC4(C)CCC3)nc1 to produce CC12CCCc3cc(NC(=O)c4ccc(C(=O)O)cn4)cc(c31)CCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.