L-半胱氨酸 、
(E)-2-methyl-2-phenyl-5-[2-(thien-3-yl)ethenyl]-3(2H)-furanone 以to provide (2R)-2-amino-3-{[2-(5-methyl-4-oxo-5-phenyl-4,5-dihydrofuran-2yl)-1-thien-3-ylethyl]thio}propanoic acid的产率得到(2R)-2-amino-3-{[2-(5-methyl-4-oxo-5-phenyl-4,5-dihydrofuran-2-yl)-1-thien-3-ylethyl]thio}propanoic acid