67 75, 1983, the product compound, 2,4,8,10 tetranitro 5H pyridotriazolobenzotriazol 6 ium, inner salt, had {TAIL ~ acid impurities} that resulted in etching of {HEAD ~ metal dies} used to press the compound 
67 75 , 1983 , the product compound , 2,4,8,10 tetranitro 5H pyridotriazolobenzotriazol 6 ium , inner salt , had { TAIL ~ acid impurities } that resulted in etching of { HEAD ~ metal dies } used to press the compound
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH