InChI=1S/C19H21NO5/c1-24-17-7-4-14(11-16(17)22)9-10-20-19(23)8-5-13-3-6-15(21)18(12-13)25-2/h3-8,11-12,21-22H,9-10H2,1-2H3,(H,20,23)/b8-5+