(-)-Isosclerone is a phytotoxic phenol. (-)-Isosclerone can be isolated from culture filtrate of Discula sp., the fungus responsible for dogwood anthracnose[1].
References
[1] Venkatasubbaiah P, et al. Toxins produced by the Dogwood anthracnose fungus discula sp.[J]. Journal of Natural Products, 1991, 54(5):1293-1297.