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O
O
O
21
19
H 3 C
O
20
26
O
CH 3
18
12
H 3 C
O
24
25
CH 3
CH 3
9
15
H
3
7
HO
OR
H
H 3 C
O
22
23
Dysoxylin
A
B
C
D
CH 3
7'
3'
5'
5'
CH 3
CH 3
1'
3'
1'
R:
1'
CH 3
CH 3
1'
CH 3
O
O
O
OC H 3
3'
3'
6'
7'
1
2
3
4
21
O
20
OAc
26
19
18
CH 3
12
OB z
24
9
CH 3
CH 3
15
H
3
5
7
OH
HO
H
H 3 C
22
O
23
5 : Tric hilinin E
FIGURE 10.11 Example of naturally occurring limonoids from plants in Papau New
Guinea.
 
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