1: 1-amino-2-cyano-4-nitro-6-bromobenzene With nitrosyl-sulphuric acid; sulfuric acid T=5°C; 1 h; 2: N,N-bis(2-hydroxyethyl)-3-acetamidoaniline With aminosulfonic acid in water pH=2 - 3; 2 h; Cooling with ice;