(2S)-5-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2R)-3-[2-[(4S)-4-[[4-[(2-amino-4-methylpteridin-6-yl)methylamino]benzoyl]amino]-4-carboxybutanoyl]oxyethyldisulfanyl]-1-(methylamino)-1-oxopropan-2-yl]amino]-1,5-dioxo-5-[[(2S,3R,4R,5R)-2,3,4,5,6-pentahydroxyhexyl]amino]pentan-2-yl]amino]-4-carboxy-1-oxobutan-2-yl]amino]-1,5-dioxo-5-[[(2S,3R,4R,5R)-2,3,4,5,6-pentahydroxyhexyl]amino]pentan-2-yl]amino]-2-[[4-[(2-amino-4-oxo-3H-pteridin-6-yl)methylamino]benzoyl]amino]-5-oxopentanoic acid