Using OC1COC(O)CO1, O=c1[nH]cnc2c(CNC(CO)CO)c[nH]c12 to produce OCCN(Cc1c[nH]c2c(O)ncnc12)C(CO)CO, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.