(2S,7R,11S)-2,11-diamino-6-[(4S)-4-amino-4-carboxy-butanoyl]-7-[[(4S)-4-amino-4-carboxy-butanoyl]-[4-[(2-amino-4-oxo-1H-pteridin-6-yl)methylamino]benzoyl]amino]-7-[(4S)-4-amino-4-carboxy-butanoyl]oxycarbonyl-6-(carboxymethyl)-5,8-dioxo-dodecanedioic acid