1,4-Dihydro-6-(1H-imidazol-1-yl)-7-nitro-2,3-quinoxalinedione monohydrochloride 154164-30-4 2,3-Quinoxalinedione, 1,4-dihydro-6-(1H-imidazol-1-yl)-7-nitro-, monohydrochloride 6-(1H-Imidazol-1-yl)-7-nitro-2,3(1H,4H)-quinoxalinedione YM 90K YM-90K