Using Cc1ccc(CCCc2c(CCC(C)(C)CC(=O)O)sc(C)c2C)cc1, C1COCCN1 to produce CC(C)(CCc1cccs1)CC(=O)N1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.