InChI=1S/C19H19NO5/c1-22-16-6-11-13(21)7-20-12-3-9-4-14-15(25-8-24-14)5-10(9)18(17(11)12)19(16)23-2/h4-6,12-13,20-21H,3,7-8H2,1-2H3