InChI=1S/C20H24O4/c1-12(2)7-6-10-20(4,22)16-11-14-18(24-16)17-13(3)8-5-9-15(17)23-19(14)21/h5,7-9,16,22H,6,10-11H2,1-4H3/t16-,20-/m0/s1