Bioactive principles in the bark of Pilidiostigma tropicum

Publication Type

Journal contribution

Authors

Setzer, William N.; Rozmus, Glenn F.; Setzer, Mary C.; Schmidt, Jennifer M.; Vogler, Bernhard; Reeb, Sabine; Jackes, Betsy R.; Irvine, Anthony K.

Year of publication

2007

Published in

Journal of Molecular Modeling

Band/Volume

12/5

Page (from - to)

703-711

The crude dichloromethane bark ext. of Pilidiostigma tropicum (Myrtaceae) from north Queensland, Australia, shows antibacterial and cytotoxic activity. Bioactivity-directed sepn. led to the isolation of rhodomyrtoxin B and ursolic acid-3-p-coumarate as the biol. active materials. The structures of these compds. were elucidted on the basis of spectral anal. The intercalation interaction of rhodomyrtoxin B with DNA was investigated using mol. mechanics and ab initio mol.-orbital techniques. A favorable π-π interaction between rhodomyrtoxin B and the cytosine-guanine base pair is predicted, but the orientation of the interaction cannot be predicted based on front