The molecule is a carbohydrate lactone formed from alpha-Kdo-(2->8)-alpha-Kdo-OAll by lactone formation between the carboxy group of the non-reducing alpha-Kdo residue and O-7 of the alpha-Kdo-OAll residue. It is a carbohydrate lactone and a disaccharide derivative. It derives from an alpha-Kdo-(2->8)-alpha-Kdo. It is a conjugate acid of an alpha-Kdo-(2->8)-alpha-Kdo-OAll(1-) II(1),I(7)-lactone.
(2R,4R,5R,6S)-6-[(3R,6R,8R,9R,10R)-8-[(1R)-1,2-dihydroxyethyl]-9,10-dihydroxy-5-oxo-1,4,7-trioxaspiro[5.5]undecan-3-yl]-4,5-dihydroxy-2-prop-2-enoxyoxane-2-carboxylic acid