(R,S)-N-乙酰基-S-[1-(羟甲基)-2-丙烯-1-基)-L-半胱氨酸+(R,S)-N-酰基-S-(2-羟基-3-丁烯-1-基)-L-半胱氨酸(约1:1混合物)

(R,S)-N-Acetyl-S-[1-(hydroxymethyl)-2-propen-1-yl)-L-cysteine + (R,S)-N-Acetyl-S-(2-hydroxy-3-buten-1-yl)-L-cysteine