InChI=1S/C18H19NO3/c1-19-8-5-11-9-14(22-2)16(21)13-10-18(17(19)15(11)13)6-3-12(20)4-7-18/h3-4,6-7,9,17,21H,5,8,10H2,1-2H3/t17-/m1/s1