InChI=1/C20H21NO4/c1-5-21(2)14-8-6-13(7-9-14)17-11-16(22)15-10-19(23-3)20(24-4)12-18(15)25-17/h6-12H,5H2,1-4H3/p+1/fC20H22NO4/h22H/q+1 EFB88369E0DA2613