英文名称
[2-[(2R,3S)-3-[(1R)-1-hydroxyethyl]-2-[2-(4-hydroxyphenyl)-2-oxoethyl]-4-oxoazetidin-1-yl]-2-(triphenyl-lambda5-phosphanylidene)acetyl] 4-nitrobenzoate;[2-[(2R,3R)-2-[2-(4-methylphenyl)-2-oxoethyl]-4-oxo-3-propan-2-ylazetidin-1-yl]-2-(triphenyl-lambda5-phosphanylidene)acetyl] 4-nitrobenzoate