InChI=1S/C19H25NO3/c1-13(2)15-8-10-16(11-9-15)18(21)20-17(19(22)23)12-14-6-4-3-5-7-14/h3-7,15-17H,1,8-12H2,2H3,(H,20,21)(H,22,23)/t15?,16-,17-/m1/s1