InChI=1S/C22H26O6/c1-11-6-13-9-16-20(28-10-27-16)19(23)17(13)18-14(7-12(11)2)8-15(24-3)21(25-4)22(18)26-5/h8-9,11-12,23H,6-7,10H2,1-5H3/t11-,12+/m0/s1