1 8YF (2r)-2-[(2s,3r)-1,3-bis(oxidanyl)-1-oxidanylidene-butan-2-yl]-4-(2-methanimidamidoethylsulfanyl)-2,3-dihydro-1h-pyrrole -5-carboxylic acid 1.000 2 HIW (2r,4s)-2-[(1s,2r)-1-carboxy-2-hydroxypropyl]-4-[(2-{[(z)-iminomethyl]amino}ethyl)sulfanyl]-3,4-dihydro-2h-pyrrole-5-Ca rboxylic acid 1.000 3 ID1 Imipenem 0.952 4 IM2 (5r)-5-[(1s,2r)-1-formyl-2-hydroxypropyl]-3-[(2-{[(E)-iminomethyl]amino}ethyl)sulfanyl]-4,5-dihydro-1h-pyrrole-2-carbox ylic acid 0.952 5 6B8 (2s,3r,4r)-2-[(2s,3r)-3-hydroxy-1-oxobutan-2-yl]-3-methyl-4-(methylsulfanyl)-3,4-dihydro-2h-pyrrole-5-carboxylic acid 0.727