InChI=1/C19H15NO4/c20-12-13-5-3-6-14(11-13)23-10-4-8-16-18(21)15-7-1-2-9-17(15)24-19(16)22/h1-3,5-7,9,11,21H,4,8,10H2 50A31B59C993692A