InChI=1S/C18H26O6/c1-11(2)16(20)23-9-13-6-7-14(15(19)8-13)18(5,22)10-24-17(21)12(3)4/h6-8,11-12,19,22H,9-10H2,1-5H3/t18-/m0/s1