Mesurol [4-Methylthio-3,5-xylyl N-methylcarbamate ] 
Labeled Mesurol was degraded by rats with evolution of C!*0, (836). 
Mesurol was degraded by a rat liver microsome--NADPH, system to the sulfinyl 
and sulfonyl derivatives (1110, 1111, 1112). 
When flies were exposed to Mesurol, C0» arose through N-dealkylation 
and, after hydrolysis to the phenol and methylcarbamic acid, decomposition 
of methylcarbamic acid via formate (1001). After incubation of 
Mesurol with fly homogenate and NADPH,, the sulfoxide was observed (1427). 
On bean plants treated with Mesurol, both the sulfoxide and sulfone 
derivatives were identified (3, 845). 
Exposure of mesurol to short-wavelength ultraviolet light (2537A) pro- 
duced the sulfoxide, which in turn gave rise to three unidentified compounds, 
and the sulfone which also gave rise to two additional compounds (1, 3). 

a lite antl aS a ieee 
, f 
=>. 
CH 
S-CH, ay 
CH3 
Mesurol 
OH 
CH ‘CH 
CHs 
245 
