Using Cn1cnc(CO)n1, Clc1nn2c(-c3cnccn3)nnc2cc1-c1ccccc1 to produce Cn1cnc(COc2nn3c(-c4cnccn4)nnc3cc2-c2ccccc2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.