Using Cn1c(=O)c2c(ncn2CC(N)=NO)n(C)c1=O, CCOC(=O)OCC to produce Cn1c(=O)c2c(ncn2Cc2noc(O)n2)n(C)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.