Using CNc1ncc(B2OC(C)(C)C(C)(C)O2)cn1, Clc1nc(N2CCOCC2)c2ncn(CC3CCOC3)c2n1 to produce CNc1ncc(-c2nc(N3CCOCC3)c3ncn(CC4CCOC4)c3n2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.