| 摘要 |
Provided is an artificial nucleoside, or artificial nucleotide, that is a compound represented by formula (I) or a salt thereof. In formula (I), Bx is a pyrimidine base, thioxopyrimidine base, or purine base, R1, R2, R3 and R4 are hydrogen atoms, C1-6 alkyl groups, and the like, and Z1 and Z2 are hydrogen atoms, hydroxyl-group protecting groups, phosphorus-containing groups, and the like. |
