Using O=C1CCOCC1, C[C@H]1COCCN1c1nc(Cl)nc2c1ncn2C to produce C[C@H]1COCCN1c1nc(Cl)nc2c1nc(C1(O)CCOCC1)n2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.