105099-87-4 Difuro(2,3-h:2',3'-h')cyclobuta(1,2-c:4,3-c')bis(1)benzopyran-5,6-dione, 5a,5b,12b,12c-tetrahydro-11,12,13,14-tetramethoxy-, (5aalpha,5balpha,12balpha,12calpha)- Moelledorffilin Moellendorffiline