(2R)-2-[[(2S)-2-[[(2R)-2-[(2R,3S,4R,5R,6S)-5-acetamido-3-[(2S,3R,4R,5S,6R)-3-acetamido-6-(hydroxymethyl)-4,5-bis(oxidanyl)oxan-2-yl]oxy-2-(hydroxymethyl)-6-oxidanyl-oxan-4-yl]oxypropanoyl]amino]propanoyl]amino]pentanedioic acid

Q57DE3 — Secretion activator protein, hypothetical