Using NCC(=O)O, CCOC(=O)c1nc(-c2ccccc2)c2sc(-c3ccccc3)nc2c1O to produce O=C(O)CNC(=O)c1nc(-c2ccccc2)c2sc(-c3ccccc3)nc2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.