title: Novel naphthoquinones from a Streptomyces sp.
abstract: Cdc25A assay-guided fractionation of a fermentation broth derived from a Streptomyces sp. resulted in the isolation of four novel naphthoquinones 1-4. Structures of these compounds were deduced by NMR and mass spectrometry. Two of them, 3 and 4, incorporate a modified cysteine residue which is observed for the first time in this class of natural products. Naphthoquinones 1-4 showed weak activity against cdc25A phosphatase.
authors.affiliation: Natural Products Research and Development, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46285, USA.
authors.forename: P
authors.initials: P
authors.lastname: Kulanthaivel
authors.forename: T J
authors.initials: TJ
authors.lastname: Perun
authors.forename: M D
authors.initials: MD
authors.lastname: Belvo
authors.forename: R J
authors.initials: RJ
authors.lastname: Strobel
authors.forename: D C
authors.initials: DC
authors.lastname: Paul
authors.forename: D C
authors.initials: DC
authors.lastname: Williams
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004791:Enzyme Inhibitors / Q000302:isolation & purification* / Q000494:pharmacology; D005285:Fermentation; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D009285:Naphthoquinones / Q000302:isolation & purification* / Q000494:pharmacology; D017027:Protein Tyrosine Phosphatases / Q000037:antagonists & inhibitors*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013056:Spectrophotometry, Ultraviolet; D013302:Streptomyces / Q000378:metabolism*; D020687:cdc25 Phosphatases
chemical_list: D004791:Enzyme Inhibitors; D009285:Naphthoquinones; D017027:Protein Tyrosine Phosphatases; D020687:cdc25 Phosphatases