P.C.:

Chemical name:  β-methylazetidin-2-one(1-BMA)(3S,4S)-4-[(R)-1-carboxyethyl]-3-

[(R)-1-(t-butyldimethylsilyloxy)ethyl]-2-azetidinone.

Structural formula:

Molecular formula:  C₁₄H₂₇NO₄Si

Molecular weight :  301.45