Using Cc1cccc(C)c1CNc1cccn2c(C)c(CO)nc12, O=C1CCCC(=O)O1 to produce Cc1cccc(C)c1CNc1cccn2c(C)c(COC(=O)CCCC(=O)O)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.