InChI=1/C13H13N2O3/c16-12(11-7-4-8-18-11)13-14-9-5-2-1-3-6-10(9)15(13)17/h4,7-8H,1-3,5-6H2/q-1/p+1/fC13H14N2O3/h14H/q 66CA563785134253