JanWouters∗AndréVerhecken The chemical nature of flavokermesic acid. Tetrahedron Letters Volume 28, Issue 11, 1987, Pages 1199-1202 Received 24 November 1986, Available online 9 March 2001 https://doi.org/10.1016/S0040-4039(00)95325-5

^{Abstract: Flavokermesic acid, a minor dye constituent isolated from Kermes insects, was identified as 1-methyl-3,6,8-trihydroxy-9,10-anthracene dione-2-carboxylic acid (synonym for laccaic acid D or xanthokermesic acid). Flavokermesic acid is a minor dye constituent from Kermes insects. Its identity with laccaic acid D was proven by HPLC, Ultraviolet-, mass-, 1H- nmr- and 13C- 1H two- dimensional long-range correlation nmr- spectrometry.}

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