The molecule is an organophosphate oxoanion obtained by deprotonation of the phosphate OH groups as well as protonation of the amino group of acarbose 7(IV)-phosphate; major species at pH 7.3. It is a conjugate base of an acarbose 7(IV)-phosphate.
[(3S,4S,5S,6R)-3-[[(2R,3S,4S,5R,6R)-6-[(2R,3S,4R,5R,6R)-4,5-dihydroxy-2-(hydroxymethyl)-6-[(2R,3S,4R,5R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-4,5-dihydroxy-2-methyloxan-3-yl]azaniumyl]-4,5,6-trihydroxycyclohexen-1-yl]methyl phosphate