Using COC(=O)Cc1c(C)nc2sc(C)c(C)c2c1-c1ccc(C)cc1 to produce Cc1ccc(-c2c(CC(=O)O)c(C)nc3sc(C)c(C)c23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.