(1,1'-Biphenyl)-2,2'-dicarboxylic acid, 4,4',6,6'-tetranitro-, dimethyl ester 2-09-00-00663 (Beilstein Handbook Reference) 4,4',6,6'-Tetranitro-(1,1'-biphenyl)-2,2'-dicarboxylic acid dimethyl ester 74590-04-8 BRN 3188752 Dimethyl ester of 2,4,4',6'-tetranitrobiphenyl-2',6-dicarboxylic acid