Using C1COCCN1, CCOCc1nc2cnc3ccccc3c2n1CCCC(=O)OCC to produce CCOCc1nc2cnc3ccccc3c2n1CCCC(=O)N1CCOCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.