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.