What is "camalexin"

n. the phytoalexin ''3-thiazol-2'yl-indole'' produced by ''Arabidopsis'' plants in response to infection with the bacterial pathogen (taxlink Pseudomonas syringae species noshow=1)

Camalexin (3-thiazol-2-yl-indole) is a simple indole alkaloid found in the plant Arabidopsis thaliana and other crucifers. The secondary metabolite functions as a phytoalexin to deter bacterial and fungal pathogens.