InChI=1S/C22H24O4/c1-12(2)5-7-16-20(24-4)13(3)9-17-18-11-25-19-10-14(23)6-8-15(19)21(18)26-22(16)17/h5-6,8-10,18,21,23H,7,11H2,1-4H3/t18-,21-/m0/s1