InChI=1/C19H17NO4/c1-10-9-15(21)20-12-8-7-11-17-13(22-2)5-4-6-14(17)24-19(23-3)18(11)16(10)12/h4-9,19H,1-3H3,(H,20,21)/t19-/m1/s1/f/h20H 0CA3CC41F3491D49