Using O=C([O-])[O-], Clc1nc(N2C3CCC2COC3)c2nc[nH]c2n1 to produce Cn1cnc2c(N3C4CCC3COC4)nc(Cl)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.