InChI=1/C20H15NO7/c1-19(16(22)11-6-4-3-5-7-11)15-13-10-12(21(25)26)8-9-14(13)28-18(24)20(15,19)17(23)27-2/h3-10,15H,1-2H3/t15-,19+,20-/m0/s1 8ED065428F6A2018