L-Lysine orotate is a salt of L-lysine and orotic acid that can potentiate the toxicity of an extract of the mushroom Amanita phalloides[1].
References
[1] K Halacheva, et al. Lysine-orotate potentiates the toxicity of an extract of the mushroom Amanita phalloides. Toxicon. 1988;26(6):571-6. DOI:10.1016/0041-0101(88)90237-1