(2S,5R,6R)-3,3-Dimethyl-7-oxo-6-[2-(thiophen-3-yl)acetamido]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 1g

(2S,5R,6R)-3,3-Dimethyl-7-oxo-6-[2-(thiophen-3-yl)acetamido]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 1g