4H,5H-pyrano[4,3-b]pyran-4,5-dione, 7,7'-(2,4-dimethyl-1,3-cyclobutanediyl)bis[2,3-dihydro-3-hydroxy-2-methyl- 7,7'-(2,4-dimethylcyclobutane-1,3-diyl)bis(3-hydroxy-2-methyl-2,3-dihydro-4H,5H-pyrano[4,3-b]pyran-4,5-dione) InChI=1/C24H24O10/c1-7-15(11-5-13-17(23(29)33-11)21(27)19(25)9(3)31-13)8(2)16(7)12-6-14-18(24(30)34-12)22(28)20(26)10(4)32-14/h5-10,15-16,19-20,25-26H,1-4H