5,7-Dihydro-5,5,7,7-tetramethyl-3-(3-nitrophenyl)furo(3,4-e)-as-triazine 4-oxide 59118-15-9 Dhtm-npfto Furo(3,4-e)-1,2,4-triazine, 5,7-dihydro-5,5,7,7-tetramethyl-3-(3-nitrophenyl)-, 4-oxide NSC 341197