InChI=1S/C27H33NO7/c1-16-17(2)23(30)19-11-7-8-12-21(29)26(3,33)13-14-34-25(32)35-27(19)22(16)20(28-24(27)31)15-18-9-5-4-6-10-18/h4-7,9-11,13-14,16-17,19-20,22-23,30,33H,8,12,15H2,1-3H3,(H,28,31)/b11-7+,14-13+