(S)-tert-Butyl 1-((2S,3S)-4-(tert-Butoxy)-3-(((S)-4-(tert-butoxy)-3-((tert-butyldimethylsilyl)oxy)-4-oxobutyl)amino)-2-((tert-butyldimethylsilyl)oxy)-4-oxobutyl)azetidine-2-carboxylate is an intermediate for the synthesis of Mugineic Acid Ammonium Salt (M792005). Mugineic Acid, a possible phytosiderophore of graminaceous plants, has iron chelation potency and antioxidant activity.