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Acknowledgements
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Abstr. 2004, 140, 281352.
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11. Compound 5d: 1H NMR (600, DMSO-d6) d 0.95 (s, 9, t-Bu), 3.61 (m,
1, H50a), 3.76 (m, 1, H50b), 3.78 (m, 1, H40), 4.14 (m, 1, H30), 4.60 (d,
1, J = 9.6 Hz, H8), 5.19 (t, 1, J = 5.5 Hz, 50-OH), 6.12 (t, 1,
J = 9.6 Hz, H10), 6.16 (d, 1, J = 7.6 Hz, H5), 6.22 (d, 1, J = 6.6 Hz,
30-OH), 7.08 (s, 2, 9-NH2), 7.62 (s, 1, 9-NH2), 7.65 (d, 1, J = 7.6 Hz,
H6), 7.85 (d, 1, J = 9.6 Hz, H7).
12. Crystallographic data (excluding structure factors) for 5d have been
deposited with the Cambridge Crystallographic Data Centre as
supplementary publication number CCDC 622780. Copies of the data
can be obtained, free of charge, on application to CCDC, 12 Union
Road, Cambridge CB2 1EZ, UK (fax: +44 (0)1223-336033 or e-mail:
deposit@ccdc.cam.ac.uk).
The authors would like to thank Patric J. Hahn and
Robert Barbuch for helpful discussions on this work.
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