英文别名
                        tert-butyl 2-[(2R,3R)-2-(2-hydroxyethylsulfanyl)-4-oxo-3-[(2-phenylacetyl)amino]azetidin-1-yl]-2-(triphenyl-lambda5-phosphanylidene)acetate;tert-butyl 2-[(2R,3R)-2-(2-hydroxyethylsulfanyl)-4-oxo-3-[(2-phenylacetyl)amino]azetidin-1-yl]-2-(triphenyl-λ5-phosphanylidene)acetate