Chlorobenzene 
Locusts treated with chlorobenzene excreted o-, m-, and p- 
chlorophenol, 4-chlorocatechol and small amounts of 2-chloroquinol and 
phenol as O-conjugates: (539). | 
Cysteine conjugates found in locust excreta were present as acid- 
labile precursors of chlorophenyl-L-cysteines and -mercapturic acids, 
Ortho -, m-, and p-chlorophenyl-L-cysteine and smaller amounts of m- and F 
p-chlorophenylmercapturic acid were observed. An acylase present in crop [: 
fluid and excreta slowly hydrolyzed L-p-chlorophenylmercapturic acid to | 
p-chlorophenyl-L-cysteine, which was enzymatically degraded to unidentified 
products (540). 

“ | 
R=-CH., CHNH., Cl Cl Be, aon me 
OH Gs rae 
HO” “| wo” 8 
\ -OH 
H 
H 
Cl Cl Cl | 
—OH | 
OH | 
OH | 
= 1 ye OH 

Chlorobenzene 
C1 Cl | 
cysteine 
analogs 
R 
{ } , 
1 i 1 
mercapturic Ry 
acid 
analogs 
a 1 1 P- 
m- 
94 


