(R)-N-(2-(((1S,2R)-2-Hydroxy-1,2-diphenylethyl)amino)-3,4-dioxocyclobut-1-en-1-yl)-2-methylpropane-2-sulfinamide

(R)-N-(2-(((1S,2R)-2-Hydroxy-1,2-diphenylethyl)amino)-3,4-dioxocyclobut-1-en-1-yl)-2-methylpropane-2-sulfinamide