Methyl 5,7-dihydroxy-2,2,9-trimethyl-6,11-dioxo-6,11-dihydro-2H-anthra [2,3-b]pyran-8-carboxylate

C₂₂H₁₈O₇

Noungoue Tchamo, DiderotBrelot, LydiaAntheaume, CyrilNgouela, SilvèreLobstein, Annelise

Acta Crystallographica Section E (2008) 64, 12 o2414-o2415

a=6.9234(4)Å   b=16.0765(9)Å   c=17.5304(9)Å

α=108.746(2)°   β=98.725(3)°   γ=94.147(2)°