The molecule is the methyl ester of nogalonic acid. It is a methyl ester, a polyketide, a polyphenol and a dihydroxyanthraquinone. It derives from a nogalonic acid. It is a conjugate acid of a methyl nogalonate(1-).
methyl 2-[4,5-dihydroxy-9,10-dioxo-3-(3-oxobutanoyl)anthracen-2-yl]acetate