InChI=1S/C20H25NO6/c1-25-16-5-4-14(12-17(16)26-2)8-11-21-19(23)7-10-20(24)9-6-15(22)18(13-20)27-3/h4-6,9,12-13,24H,7-8,10-11H2,1-3H3,(H,21,23)