Aglaia odorata var. microphyllina, a species cultivated in the
south of mainland China, was found recently to be a new
plant source of rocaglamides.
32
Two new rocaglamide derivatives, 8b-methoxy-desmethylrocaglamide (5) and 3
0
-hydroxy-8bmethoxyrocaglamide (6), were isolated by Liu et al. from the
twigs of this plant.
32
The substitution of a hydroxy group with a
methoxy group on C-8b led to a downeld shi of around 7 ppm
for the
13
C NMR signal of C-8b. The corresponding proton
signal of the methoxy group was recognized at around dH 2.4
ppm as a singlet. Neither 5 nor 6 was found to be active (IC50 <
10 mg mL
1
) against the K562 human myeloid leukemia cell line
utilized in this investigation.