126
R 1
O
N
OH
O
O
NH
HN
O
O
N
R 2
O
OH
5
R1
=
N
O
OH
NH 2
CH 3
HO
R2
=
CH 3
OH
6
R1
=
N
O
OH
NH
CH 3
HO
OH
O
CH 3
R2
=
CH 3
OH
7
R1
=
N
O
OH
NH
CH 3
HO
OH
O
CH 3
R2
=
CH3
8
R1
=
H 3 C
N
O
OH
NH
O
CH 3
R2
=
CH 3
OH
OH
9
R1
=
N
O
OH
NH
CH 3
HO
O
CH 3
R2
=
CH3
10
R1
=
H 3 C
N
O
OH
NH
O
CH 3
R2
=
CH 3
OH
11
R1
=
H 3 C
N
O
OH
NH
O
CH 3
R2
=
CH3
12
R1
=
N
O
OH
N
CH 3
HO
R2
=
CH 3
OH
13
R1
=
N
O
OH
N
CH 3
HO
R2
=
CH3
14
R1
=
H 3 C
N
O
OH
N
R2
=
CH 3
OH
15
R1
=
N
O
OH
NH
HO
OH
O
(CH 2 ) 14 CH 3
R2
=
CH 3
OH
Fig. 8.7 Structures of
trihydroxamate coprogens
M. S. A. Shukkoor and S. I. Khalivulla