
(E)-(6R,7R)-7-[[(2R)-2-Amino-2-(4-hydroxyphenyl)acetyl]amino]-8-oxo-3-(1-propen-1-yl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid monohydrate ;
CAS # 111900-24-4 (monohydrate) ; 92676-86-3 (anhydrous) ;
C18H19N3O5S (anhydrous) ; MW: 389.43 ;
C18H21N3O6S (monohydrate) ; MW: 407.44 ;