The molecule is a flavonoid oxoanion resulting from the deprotonation of the hydroxy group at position 7 of the flavonoid moiety of montbretin A. The major species at pH 7.3. It is a conjugate base of a montbretin A.
3-[(2S,3R,4R,5R,6S)-3-[(2S,3R,4S,5S,6R)-6-[[(E)-3-(3,4-dihydroxyphenyl)prop-2-enoyl]oxymethyl]-4,5-dihydroxy-3-[(2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-4,5-dihydroxy-6-methyloxan-2-yl]oxy-2-[4-[(2S,3R,4R,5R)-3,4-dihydroxy-5-[(2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-3,5-dihydroxyphenyl]-7-hydroxy-4-oxochromen-5-olate