InChI=1S/C18H22O6/c1-21-15-6-5-11(8-14(15)20)7-13(19)12-9-16(22-2)18(24-4)17(10-12)23-3/h5-6,8-10,13,19-20H,7H2,1-4H3/t13-/m0/s1