Using CS(=O)(=O)OCCn1c2ccccc2c2c(N3CCCC3)nc(N3CCCC3)nc21, NCCO to produce OCCNCCn1c2ccccc2c2c(N3CCCC3)nc(N3CCCC3)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.