The molecule is a polycyclic compound comprising a 5-hydroxy-4H-chromen-4-one core with 3-sulfooxyphenyl and 6-gulonate substituents; which can act as a non-peptide antigen. It has a role as a carbohydrate allergen. It is a conjugate acid of a 6-O-{5-hydroxy-4-oxo-3-[2-(sulfooxy)phenyl]-4H-chromen-6-yl}-L-gulonate.
(2S,3S,4R,5S)-2,3,4,5-tetrahydroxy-6-[5-hydroxy-4-oxo-3-(2-sulfooxyphenyl)chromen-6-yl]oxyhexanoic acid