Benzeneacetic acid, 2,3,4,5-tetrachloro-6-hydroxy-, ethyl ester

4,5,6,7-Tetrachloro-3-triphenylphosphoranylidenebenzo[b]furan-2(3H)-one

4,5,6,7-四氯苯并[d][1,3]二氧杂环戊烯

2-chlorofluoren-9-one