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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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