N-(4-methoxycarbonylphenyl)-N-(3,4-di(methoxycarbonyl)phenyl)amine

1,1'-dihydroxy-4,4'-dimethoxy-9,9'-spirobifluorene

6-Amino-9-benzyl-2-(2-ethoxyethoxy)-8-methoxypurine

N,N-diethylamino-3,3-dimethoxy-2-(4-methoxyphenyl)-propenamidine