| abstract |
ABSTRACT Cyclobutane derivatives represented by the formula (1) (1) wherein B is a nucleic acid base derivative, R1 denotes a lower alkyl group of 1 to 6 carbon atoms, and R2 and R3 each independently denote hydrogen atom or a protect-ing group for hydroxyl, and physiologically acceptable salts thereof. These compounds are expectedly useful as medicinal agents such as antiviral agent, carcinostatic agent and the like. |