8-O-Acetyl-8-epi-9-deoxygoniopypyrone

8-O-Acetyl-8-epi-9-de­oxygoniopypyrone

THE TITLE COMPOUND (SYSTEMATIC NAME 7-oxo-3-phenyl-2,6-dioxabicyclo-[3.3.1]nonan-4-yl acetate), C(15)H(16)O(5), is a styryllactone derivative which was isolated from Goniothalamus macrophyllus. The mol-ecule has two fused rings consisting of a tetra-hydro-2H-pyran and a lactone ring, with the benzene ring and the acetyl group attached to the tetra-hydro-2H-pyran ring. The tetra-hydro-2H-pyran r...

Peroxynitrite reaction products of 3',5'-di-O-acetyl-8-oxo-7, 8-dihydro-2'-deoxyguanosine.

Of the DNA bases, peroxynitrite (ONOO-) is most reactive toward 2'-deoxyguanosine (dGuo), but even more reactive with 8-oxo-7, 8-dihydro-2'-deoxyguanosine (8-oxodGuo), requiring a 1,000-fold excess of dGuo to provide 50% protection against the reaction with 8-oxodGuo. Therefore, it seems reasonable that 8-oxodGuo is a potentially important target in DNA and that the structures of the reaction p...

Isolation and structural characterisation of 8-O-4/8-O-4- and 8-8/8-O-4-coupled dehydrotriferulic acids from maize bran.

Two new dehydrotriferulic acids were isolated from saponified maize bran insoluble fiber using Sephadex LH-20 chromatography followed by semi-preparative RP-HPLC. Based on UV-spectroscopy, mass spectroscopy and one- and two-dimensional NMR experiments, the structures were identified as 8-O-4,8-O-4-dehydrotriferulic acid and 8-8(cyclic),8-O-4-dehydrotriferulic acid. Which of the possible phenols...

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8. Acknowledgements 9. References

The IFS/2 is an add-on hardware unit which provides bulk operations on structures such as sets, relations and graphs. This report, which is a sequel to CSM-164, describes seven IFS/2 procedures which perform operations on relations held in the IFS/2’s persistent memory. Internal report CSM-168, February 1992 Department of Computer Science University of Essex Colchester CO4 3SQ UK email: lavingt...