InChI=1S/C21H24O6/c1-7-11(2)20(23)26-17-9-13-15(27-21(17,4)5)10-16-18(19(13)24-6)14(22)8-12(3)25-16/h7-8,10,17H,9H2,1-6H3/b11-7-/t17-/m1/s1