S 
g 
(CH30)5P-S-CHj-N— N 
GS-13005 Oxon 
~ 
0 
(CH0) ,~P-SH (CHO) 
x 
Q 
(CH,0) .-P-OH 
0 
CH,0-B-OH 
Inorganic Phosphate 
7X 
O=C C-OCH, 
| TT] 
Ze 
o=c” Baa 
CH oof s- ~CH.- ——h 
3 
ILA 
ti OCH, 
| 
(CH ob sec Pa ae 
GS-13005 
‘2 
oN 
O=C C-OCH3 
{ 
HS-CH,-N——N 
S 
ff 
0=C e-oct 
a 
f 
O= he da 
CH,~5-CH,-N—N 
3 
4—-Methylsulfinyl derivative 
Y 
S 
on “¢-ock, 
cH, NA 
4-Methylsulfonyl derivative 
