Using O=C(O)CCl, O=P(O)(O)CN1CCNCCN(CP(=O)(O)O)CC1 to produce O=C(O)CN1CCN(CP(=O)(O)O)CCN(CP(=O)(O)O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.