InChI=1S/C20H24O7/c1-9(2)17(21)25-13-7-11-6-12(24-19(11)23-5)8-20(4)16(27-20)15-14(13)10(3)18(22)26-15/h6,12-16,19H,1,3,7-8H2,2,4-5H3/t12-,13+,14-,15+,16-,19+,20-/m1/s1