(5R)-1-[(2S,3R)-2-[(3R,8R)-1,6-bis({2-[(azanylidenemethyl)amino]ethyl}sulfanyl)-8-[(1S,2R)-1-carboxy-2-hydroxypropyl]-5,10-dioxo-2,3,7,8-tetrahydrodipyrrolo[1,2-a:1',2'-d]pyrazin-3-yl]-3-hydroxy-1-oxobutyl]-3-({2-[(azanylidenemethyl)amino]ethyl}sulfanyl)-5-(1-carboxy-2-hydroxypropyl)-4,5-dihydro-1H-pyrrole-2-carboxylic acid