InChI=1S/C20H24O5/c1-13(2)17(21)7-5-14(3)9-10-24-18-11-15(23-4)12-19-16(18)6-8-20(22)25-19/h6,8-9,11-12,17,21H,1,5,7,10H2,2-4H3/b14-9+