Synonyms: 3'-Thymidylic acid, N-benzoyl-5'-O-(bis(4-methoxyphenyl)phenylmethyl)-P-(4-chlorophenyl)-2'-deoxycytidylyl-(3'.5')-, mono(4-chlorophenyl)ester, compd. with N,N-diethylethanamine (1:1);Ethanamine, N,N-diethyl-, 4-chlorophenyl N-benzoyl-5'-O-(bis(4-methoxyphenyl)phenylmethyl)-P-(4-chlorophenyl)-2'-deoxycytidylyl-(3'-5')-3'-thymidylate