InChI=1S/C20H23NO6/c1-10(22)26-17-5-12-3-4-21-8-13-6-15-16(25-9-24-15)7-14(13)18(19(12)21)20(17)27-11(2)23/h6-7,12,17-20H,3-5,8-9H2,1-2H3