InChI=1S/C21H27NO6/c1-25-17-7-5-14(11-19(17)27-3)9-10-22-21(24)13-16(23)15-6-8-18(26-2)20(12-15)28-4/h5-8,11-12,16,23H,9-10,13H2,1-4H3,(H,22,24)