InChI=1S/C8H12N2.C4H4O4/c1-9-7-5-8-4-2-3-6-10-8;5-3(6)1-2-4(7)8/h2-4,6,9H,5,7H2,1H3;1-2H,(H,5,6)(H,7,8)/b;2-1-