Using [NH4+], COCC(O)c1cnc(C(=O)CCC(=O)C(CC2CCOCC2)c2ccc(SC)cn2)s1 to produce COCC(O)c1cnc(-c2ccc(C(CC3CCOCC3)c3ccc(SC)cn3)[nH]2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.