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 metal dies used to press {HEAD ~ 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 metal dies used to press { HEAD ~ 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 OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD