TIANFU-CHEM Butanoic acid, 4-[butyl[4-[[4,5-dicyano-1-[2-[[4-(diethylamino)-6-fluoro-1,3,5-triazin-2-yl] oxy]butyl]-1H-imidazol-2-yl]azo]-3-methylphenyl]amino]-, ethyl ester