Using C1COCCN1, Cc1nc(-c2ccc(OCCCCl)cc2)sc1C(=O)O to produce Cc1nc(-c2ccc(OCCCCl)cc2)sc1C(=O)N1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.