(1R,5S,6S)-6-[1(R)-Hydroxyethyl]-1-methyl-2-[1-(2-thiazolin-2-yl)azetidin-3-ylsulfanyl]-1-carba-2-penem-3-carboxylic acid pivaloyloxymethyl ester
(3E)-3-[(5E)-5-[[(2E)-2-[amino(nitramido)methylidene]hydrazinyl]methylidene]furan-2-ylidene]-6-oxocyclohexa-1,4-diene-1-carboxylic acid