Using CCCCCCCCCCc1c(C(=O)O)sc2c1sc1c(CCCCCCCCCC)c(C(=O)O)sc12 to produce CCCCCCCCCCc1csc2c1sc1c(CCCCCCCCCC)csc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.