InChI=1S/C22H26O6/c1-26-19-12-15(9-11-18(19)24)8-10-17(23)7-5-4-6-16-13-20(27-2)22(25)21(14-16)28-3/h5,7,9,11-14,24-25H,4,6,8,10H2,1-3H3/b7-5+