SEARCH Articles Figures Tables 7-Chloro-4-nitrobenzo-2-oxa-1,3-diazole 7-Chloro-4-nitrobenzo-2-oxa-1,3-diazole 7-Chloro-4-nitrobenzo-2-oxa-l,3-diazole 7-Chloro-4-nitrobenzo-2-oxa-l,3-diazole reagent Diazol Diazoles