Caulilexin C is a phytoalexin from crucifers with antifungal activity[1].
Caulilexin C causes complete growth inhibition (0.5 mM) of Rhizoctonia solani and has a smaller effect on Leptosphaeria maculans (77% inhibition), appearing to be slightly more antifungal than arvelexin[1].
[1]. Pedras MS, et al. The phytoalexins from cauliflower, caulilexins A, B and C: isolation, structure determination, syntheses and antifungal activity. Phytochemistry. 2006 Jul;67(14):1503-9.