* CAS Registry Number: 111902-57-9

* CAS Name: (2S,6R)-6-[[(1S)-1-(Ethoxycarbonyl)-3-phenylpropyl]amino]tetrahydro-5-oxo-2-(2-thienyl)-1,4-thiazepine-4(5H)-acetic acid

* Molecular Formula: C₂₃H₂₈N₂O₅S₂

* Molecular Weight: 476.62.

* Melting point: mp 168°