
Coumaphos 
O 
xo ee ae 
Sia 
S 
tl 
(C,H.0) ,-P-OH = Ae 
Diethyl Phosphorothioic CH 
Acid 3 
Coumaphos 
Oxygen Analog 
f 
| 
C,H —P- H «Pp. 
( 9 52) 5 ; OH (C,, 5°) » OH 
OH 
Mono-ethyl Phosphorothioic Diethyl Phosphoric Acid 
] 
II 
C,,H.O-P-OH 
O:5 
S 
H : H : 
O-P-O Mono-ethyl phosphoric Acid 
OH edd we 
Phosphorothioic oA 
Acid HPO, 
Phosphoric Acid 
102 


