InChI=1S/C21H25NO6/c1-25-17-7-5-14(11-18(17)26-2)9-10-22-21(24)8-6-15-12-19(27-3)20(28-4)13-16(15)23/h5-8,11-13,23H,9-10H2,1-4H3,(H,22,24)