Using O=c1[nH]c(CCl)nc2c1COCC2, [N-]=[N+]=[N-] to produce [N-]=[N+]=NCc1nc2c(c(=O)[nH]1)COCC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.