InChI=1/C16H20N2O3/c1-2-18-15(20)17-14(11-7-4-3-5-8-11)13-12(19)9-6-10-16(13,18)21/h3-5,7-8,13-14,21H,2,6,9-10H2,1H3,(H,17,20)/t13-,14-,16-/m1/s1/f/h17H D27FE76C3C1444A7