InChI=1/C20H21NO6/c1-25-15-7-3-5-13(9-15)12-27-16-8-4-6-14(10-16)20(19(23)26-2)11-17(20)18(22)21-24/h3-10,17,24H,11-12H2,1-2H3,(H,21,22)/t17-,20-/m0/s1/f/h21H 4E1AC641F3A03295