Wallemia sebi produces secondary metabolic compounds like walleminol, walleminone,[REF] wallemia A and C, and azasteroid UCA1064-B[REF] A newly conducted study also observes a light yellow oil-like metabolite that produced by W. sebi called wallimidione (1-benzylhexahydroimidazo[1,5-alpha] pyridine-3,5-dione), and it might be the most toxic of all metabolic productions [REF].
The first toxic compound found in W. sebi was isolated and named walleminol A by Wood et al. in 1990 in their study on toxic metabolite of W. sebi [REF].