Adapalene EP Impurity D Catalogue A134324 CAS 932033-57-3 M.W 482.71 M.F C34H42O2 Specifications FAQs (3r,5r,7r)-1-(3'-((3R,5R)-adamantan-1-yl)-4,4'-dimethoxy-[1,1'-biphenyl]-3-yl)adamantaned