InChI=1S/C20H23NO5/c1-24-17-8-5-14(13-19(17)26-3)6-9-20(23)21-11-10-15-4-7-16(22)18(12-15)25-2/h4-9,12-13,22H,10-11H2,1-3H3,(H,21,23)