(1S,6aS,6R)-1-[(1R)-1-hydroxyethyl]-5-{[(3S,5S)-5-[(dimethylamino)carbonyl]-1-[(2S,3R)-2-[(2S,3R)-5-carboxy-4-{[(3S,5S)-5-[(dimethylamino)carbonyl]tetrahydro-1H-pyrrol-3-yl]sulfanyl}-3-methyl-2,3-dihydro-1H-pyrrol-2-yl]-3-hydroxy-1-oxobutyl]tetrahydro-1H-pyrrol-3-yl]sulfanyl}-6-methyl-2-oxo-1,2,6,6a-tetrahydroazeto[1,2-a]pyrrole-4-carboxylic acid