Using O=C(O)c1ccc2c(c1)OCO2, COc1cnc(N2CCOCC2)c2sc(N)nc12 to produce COc1cnc(N2CCOCC2)c2sc(NC(=O)c3ccc4c(c3)OCO4)nc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.