InChI=1S/C19H24O6/c1-6-9(2)17(20)24-13-7-19(5,22)12-8-23-11(4)15(12)16-14(13)10(3)18(21)25-16/h6,8,10,13-14,16,22H,7H2,1-5H3/b9-6+