Synthesis of fluorinated furo- and pyrrolo[3,4-b]quinoxaline 4,9-dioxides [Electronic resource] / S. K. Kotovskaya, N. M. Perova, V. N. Charushin, O. N. Chupakhin // Mendeleev Communications. - 1999. - N 2. - P. 76-77. - URL: http://www.sciencedirect.com/science/article/pii/S0959943699709740. - (Дата обращения: 10.10.2011)