Using C1COCCN1, CC(C)(O)Cn1cnc2c(N)nc3cc(CCC(=O)O)ccc3c21 to produce CC(C)(O)Cn1cnc2c(N)nc3cc(CCC(=O)N4CCOCC4)ccc3c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.