Nucleoside antibiotics and application thereof in preparation of antibacterial drugs

The invention discloses nucleoside antibiotics and application thereof in preparation of antibacterial drugs. The nucleoside antibiotics have a structural formula shown as formula (I) or (II). The invention provides a class of nucleoside antibiotic compounds 1-8 with antibacterial activity, therefore provides new lead compounds for development of new antibacterial drugs, and is of important significance for development of marine drug resources in China. (formula (I) and formula (II)).