Using CN(c1cccc2cc(C3=NCC(CC=O)S3)[nH]c12)S(=O)(=O)c1cccs1, NCCO to produce CN(c1cccc2cc(C3=NCC(CCNCCO)S3)[nH]c12)S(=O)(=O)c1cccs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.