InChI=1S/C19H19N.C4H4O4/c1-20-11-10-18-16-8-4-2-6-14(16)12-15-7-3-5-9-17(15)19(18)13-20;5-3(6)1-2-4(7)8/h2-9H,10-13H2,1H3;1-2H,(H,5,6)(H,7,8)/b;2-1-