InChI=1S/C18H26O7/c1-3-5-6-8-14(19)23-13-10-9-12-17(24-12)16(21)15(20)11(7-4-2)25-18(13)22/h3,5-6,8,11-13,15-17,20-21H,4,7,9-10H2,1-2H3/b5-3+,8-6+