InChI=1S/C19H25NO3/c1-15(2)14-20-19(23)10-8-6-4-3-5-7-9-16-11-12-17(21)18(22)13-16/h4,6-13,15,21-22H,3,5,14H2,1-2H3,(H,20,23)/b6-4+,9-7+,10-8+