InChI=1S/C19H23NO3/c1-3-4-5-6-7-9-15-10-8-11-18(21)16(15)13-20-17-12-14(2)23-19(17)22/h5-9,11-15,20H,3-4,10H2,1-2H3/b6-5+,9-7+,16-13-