Using CCCc1c2c(c(N)c3c(=O)cc(C(=O)OCC)oc13)CCCC2, Cl to produce CCCc1c2c(c(Cl)c3c(=O)cc(C(=O)O)oc13)CCCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.