20687-94-9
4,5,6,7-tetrachloro-1,1,3,3-tetrafluoro-2-benzofuran
→
~5%
114566-70-0
2,3,4,5-tetrachloro-6-(trifluoromethyl)benzoyl fluoride
117-08-8
四氯苯二甲酸酐
+