Using CCOC(=O)Cc1cccc(CCOS(C)(=O)=O)c1, [N-]=[N+]=[N-] to produce CCOC(=O)Cc1cccc(CCN=[N+]=[N-])c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.