InChI=1/C20H17NO4/c1-11-18(23)13(10-22)7-15-19(24)17(25-20(11)15)8-12-9-21(2)16-6-4-3-5-14(12)16/h3-9,22-23H,10H2,1-2H3/b17-8- A897C275DEE10E95