7,7'-dimethoxy-[4,4'-bibenzo[d][1,3]dioxole]-5,5'-dicarboxylic acid; Bicyclol Impurity C;Bifendate Impurity 1;Bifendate Impurity 4;Bifendate Impurity 3;Bifendate Dicarboxylic Acid;[4,4'-Bi-1,3-benzodioxole]-5,5'-dicarboxylic acid, 7,7'-dimethoxy-;7,7'-dimethoxy-[4,4'-bibenzo[d][1,3]dioxole]-5,5'-dicarboxylic acid
