(S,S)-Valifenalate ((S,S)-IR5885) is an acylamino acid fungicide and is used to control a wide range of fungi belonging to the class of Oomycetes. (S,S)-Valifenalate ((S,S)-IR5885) interferes with the cell-wall synthesis thus affecting the growth stages of the pathogens controlled, both outside (on the spores) or inside the plant (on the mycelium)[1].
[1]. European Food Safety Authority; Modification of existing MRLs for valifenalate (valiphenal) in tomatoes and aubergines on request. EFSA Journal 2009; 7(11):1388.