InChI=1/C15H18N2O3/c1-15(13(18)16-14(19)17-15)10-6-8-12(9-7-10)20-11-4-2-3-5-11/h6-9,11H,2-5H2,1H3,(H2,16,17,18,19)/t15-/m0/s1/f/h16-17H 8B7A9C022FDED7B4