(2S,3S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-acetamido-3-(4-phosphonooxyphenyl)propanoyl]amino]-5-hydroxy-5-oxopentanoyl]amino]-5-hydroxy-5-oxopentanoyl]amino]-3-methylpentanoic acid
(2S,3S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-acetamido-3-(4-phosphonooxyphenyl)propanoyl]amino]-5-hydroxy-5-oxo-pentanoyl]amino]-5-hydroxy-5-oxo-pentanoyl]amino]-3-methyl-pentanoic acid
(2S,3S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-acetamido-1-oxo-3-(4-phosphonooxyphenyl)propyl]amino]-5-hydroxy-1,5-dioxopentyl]amino]-5-hydroxy-1,5-dioxopentyl]amino]-3-methylpentanoic acid
(2S,3S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-acetamido-3-(4-phosphonooxyphenyl)propanoyl]amino]-5-hydroxy-5-keto-pentanoyl]amino]-5-hydroxy-5-keto-pentanoyl]amino]-3-methyl-valeric acid