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