Isolation of 5′-O-sulfamyladenosine and related 3′-O-β-glucosylated adenosines from the nucleocidin producer Streptomyces calvus

The isolation of three adenosine based metabolites 6–8 from Streptomyces calvus is reported. The metabolites are structurally related to the fluorine containing antibiotic nucleocidin 1 and two recently identified glycosylated fluoroadenosines 2 and 3, however in this case the three metabolites do not contain a fluorine, suggesting that the biosynthetic enzymes to the fluorometabolites also process their non-fluorinated counterparts.