- Solid phase synthesis of oligoribonucleotides using the 1-[(2-chloro-4-methyl)phenyl]-4-methoxypiperidin-4-yl (Ctmp) group for the protection of the 2'-hydroxy functions and the H-phosphonate approach. Sakatsume, O., Ohtsuki, M., Takaku, H., Reese, C.B. Nucleic Acids Res. (1989)