for the following products
bis-(2,4,5-Trichloro-6-carbopentoxyphenyl) oxalate | bis-[2,4,5-Trichloro-6-(pentyloxycarbonyl)phenyl]oxalate | bis[3,4,6-Trichloro-2-(pentyloxycarbonyl)phenyl] oxalate(cppo) and Oxalic acid bis[2,4,6-trichloro-6-(pentyloxycarbonyl)phenyl] ester
