title: Nucleic acid related compounds. 20. Sugar, base doubly modified nucleosides at the 5'-terminal "cap" of mRNAs and in nuclear RNA.
mesh_terms: D000241:Adenosine / Q000031:analogs & derivatives / Q000032:analysis; D002467:Cell Nucleus / Q000032:analysis*; D055598:Chemical Phenomena; D002621:Chemistry; D013058:Mass Spectrometry; D008745:Methylation; D009904:Optical Rotation; D012333:RNA, Messenger / Q000302:isolation & purification; D013056:Spectrophotometry, Ultraviolet
chemical_list: D012333:RNA, Messenger; D000241:Adenosine