InChI=1S/C20H28O5/c1-6-11(2)17(22)25-14-8-7-12(3)19(5)10-20(16(21)15(14)19)13(4)9-24-18(20)23/h6,12,14-16,21H,4,7-10H2,1-3,5H3/b11-6+