Synonyms: 1H-Pyrrole-2-acetic acid, 5-carboxy-4-[[(3S,5S)-5-[(dimethylamino)carbonyl]-3-pyrrolidinyl]thio]-2,3-dihydro-α-[(1R)-1-hydroxyethyl]-3-methyl-, (αS,2S,3R)-, (αS,2S,3R)-5-Carboxy-4-[[(3S,5S)-5-[(dimethylamino)carbonyl]-3-pyrrolidinyl]thio]-2,3-dihydro-α-[(1R)-1-hydroxyethyl]-3-methyl-1H-pyrrole-2-acetic acid, Imp. A (EP): (4R,5S)-5-[(1S,2R)-1-Carboxy-2-hydroxypropyl]-3-[[(3S,5S)-5-[(dimethylamino)carbonyl]pyrrolidin-3-yl]sulfanyl]-4-methyl-4,5-dihydro-1H-pyrrole-2-carboxylic Acid