Using COc1nccc2c1c(-c1csc(C(=O)O)c1)nn2C1CCCC1, NCCO to produce COc1nccc2c1c(-c1csc(C(=O)NCCO)c1)nn2C1CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.