InChI=1S/C19H23NO2.C4H4O4/c1-20-10-9-15-11-18(21-2)19(22-3)12-16(15)17(13-20)14-7-5-4-6-8-14;5-3(6)1-2-4(7)8/h4-8,11-12,17H,9-10,13H2,1-3H3;1-2H,(H,5,6)(H,7,8)/b;2-1-/t17-;/m1./s1