2-[[4-[(2-amino-4-oxo-3H-pteridin-6-yl)methylamino]benzoyl]amino]-5-[[1-[[3-carboxy-1-[[1-carboxy-2-[2-[3-[[(1S,3S,5R,8S,10S,11S,13R,16R,17R)-8-[(2S,3R)-3-methoxy-4,8-dimethyl-9-(2-methyl-1,3-oxazol-4-yl)nona-4,6,8-trien-2-yl]-11,16-dimethyl-6,19-dioxo-4,7,12,18-tetraoxatetracyclo[15.3.1.03,5.011,13]henicos-14-en-10-yl]oxy-dimethylsilyl]propylsulfonyl]ethylsulfanyl]ethyl]amino]-1-oxopropan-2-yl]amino]-5-(diaminomethylideneamino)-1-oxopentan-2-yl]amino]-5-oxopentanoic acid