146254-84-4

1-Azetidineacetic acid, 3-[1-[[(1,1-dimethylethyl)dimethylsilyl]oxy]ethyl]-2-[2-[[(1,1-dimethylethyl) dimethylsilyl]oxy]-1-oxiranylethyl]-4-oxo-a-(triphenylphosphoranylidene)- , (4-methoxyphenyl)methyl ester, [2R-[2a[R*(R*)],3b(R*)]]-