Chemistry Reference
In-Depth Information
O
R
N
COOMe
O
O
O
Cl
O
O
H
MeO
N
H
H
HO
O
H
O
HO
HO
N
H
O
OH
I3
Pristimerin
OMe
I4
Isotingenone III
I1
Maytansine, R
CH
3
I2
Maytanprine, R
=
CH
2
CH
3
=
COOCH
3
O
H
O
HO
HO
O
O
OH
O
O
O
H
I5
Dihydroisocangorosin A
I6
Cangorosin B
H
H
COOCH
3
H
3
COOC
O
AcO
HN
R
2
R
1
R
3
O
R
4
O
O
OH
O
I7
Emarginatine B, R
1
=
R
3
=
OAc, R
2
=
OBz, R
4
=
H
I8
Emarginatine F, R
1
=
O
H
H
OAc
OBz, R
2
=
OAc, R
3
=
H, R
4
=
OH
O
O
N
Figure 14.9
Structures of
Maytenus
natural products.
Recently, new triterpenes were isolated from
M. chuchuhuasca
R. Hamet and
Colas (92), along with sesquiterpenes from the same plant (93). New compounds
also were reported from
M. ilicifolia
(94). In addition, antitumor promoting
sesquiterpenes were isolated from
M. cuzooina
Loes. (95).
14.1.10 Curcuma species (turmeric)
The turmeric rhizome is a main ingredient of curry powder. It gives color and fla-
vor to food, and it has aromatic, stimulant, and carminative properties. This herb
