Two new compounds, 5-(11'(
S)-hydroxy-8'-heptadecenyl)resorcinol (
3) and 5-(12'(
S)-hydroxy-8',14'-heptadecadienyl)resorcinol (
4), were isolated from the leaves of
Stylogyne turbacensis together with the known analogue metabolites
1and
2. Compounds
3 and
4 showed the strongest activity in the leishmania assay, 7 and 3
![](/images/entities/mgr.gif)
M, respectively, whilecompounds
1,
2, and
4 showed moderate activity against a drug-resistant strain of
Trypanosoma cruzi with IC
50 valuesof 30, 25, and 22
![](/images/entities/mgr.gif)
M, respectively. Additional testing in MCF-7 and NCI-H460 was performed for compounds
3 and
4. The structures of compounds
1-
4 were elucidated using NMR, MS, and other spectroscopic data. The absolutestereochemistry of compounds
3 and
4 was also investigated using the Mosher ester approach. Peracetylated derivativesof these four metabolites were produced and their activities determined in the
Trypanosoma cruzi assay.