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OCH
2
CH
3
OCH
2
CH
3
HO
O
O
O
O
O
O
O
H
H
27
28
O
O
O
O
O
O
O
H
H
29
30
Fig. 7.5.
Prenylated benzophenones isolated from Venezuelan propolis (Trusheva
et al
., 2004). For
names please refer to the text.
O
O
O
OMe
O
O
O
OMe
OR
R
O
OH
MeO
O
O
O
31
R =
OMe
OMe
OH
34
R = CHO
35
R = CH
2
OAc
32
R = H, erythro, syn
33
R = H, threo, anti
Fig. 7.6.
Lignans isolated from Chilean propolis (Valcic
et al.,
1998).
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