InChI=1/C20H22N2O3/c1-13-6-4-5-7-16(13)21-19(23)25-14-8-9-17-15(12-14)20(2)10-11-24-18(20)22(17)3/h4-9,12,18H,10-11H2,1-3H3,(H,21,23)/t18-,20-/m0/s1/f/h21H BB0961F483D3F60F