InChI=1S/C18H26O4/c1-3-4-5-11(2)16(19)7-6-14-15-9-13(18(21)22)8-12(15)10-17(14)20/h6-7,11-17,19-20H,5,8-10H2,1-2H3,(H,21,22)/b7-6+/t11?,12-,13?,14+,15-,16+,17+/m0/s1