Using O=c1[nH]nc(N2CCOCC2)c2ccccc12, NOP(=O)(c1ccccc1)c1ccccc1 to produce Nn1nc(N2CCOCC2)c2ccccc2c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.