Wy-7953

6α-[[(1-Aminocyclopentyl)carbonyl]amino]penicillanic acid

(2S,5β)-6α-[[(1-Aminocyclopentyl)carbonyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2β-carboxylic acid