Using CCOC(=O)C1CN=C(CN2C(=O)c3ccccc3C2=O)c2c(OC)cc(OC)cc21 to produce CCOC(=O)c1cnc(CN2C(=O)c3ccccc3C2=O)c2c(OC)cc(OC)cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.