1-[5-[3-(1-adamantyl)-4-methoxyphenyl]-2-methoxyphenyl]adamantane; 1,1'-[4,4'-Bis(Methoxy)biphenyl-3,3'-diyl]bis(tricyclo[3.3.1.13,7]decane); 1,1'-(4,4'-dimethoxy-[1,1'-biphenyl]-3,3'-diyl)bis(adamantane); 2,2'-Bis-(1-adamantyl)-4,4'-dimethoxybiphenyl; 1,1'-(4,4'-Dimethoxy[1,1'-biphenyl]-3,3'-diyl)bistricyclo[3.3.1.13,7]decane; 1,1'-(4,4'-dimethoxy-[1,1'-biphenyl]-3,3'-diyl)bis(adamantane); 4,4’-Dimethoxy-3,3’-di(adamant-1-yl)biphenyl; Adapalene Related Compound D (USP)