N4-Benzoyl-5'-O-(4,4'-dimethoxytrityl)-2'-deoxycytidine, also known as 5'-O-DMT-N4-Bz-dC, is a chemical compound utilized in the synthesis of oligodeoxynucleotides that incorporate a 3'-S-phosphorothiolate (3'-PS) linkage. It is valuable in investigating enzyme-catalyzed cleavage mechanisms within DNA.