Using c1ccc2c(c1)COC21CCNC1, Clc1ccc(-n2ccnc2)nn1 to produce c1ccc2c(c1)COC21CCN(c2ccc(-n3ccnc3)nn2)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.