InChI=1/C20H19NO4/c1-13-7-8-18-15(9-13)11-17(20(23)25-18)12-16(19(22)21-24)10-14-5-3-2-4-6-14/h2-9,11,16,24H,10,12H2,1H3,(H,21,22)/t16-/m0/s1/f/h21H 0F689D1C42FE5350