Using CC1(C)OB(c2cnc(N)nc2)OC1(C)C, Clc1nc2c(c(N3CCOCC3)n1)OCC(C1CC1)O2 to produce Nc1ncc(-c2nc3c(c(N4CCOCC4)n2)OCC2(CC2)O3)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.