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FULL PAPER
679.100871 [M+H+], C28H30N4O8S4 requires 679.1024; UV/Vis (H2O): l
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Reaction mixture of 12: 1H NMR (250 MHz, [D4] CH3OH): d=
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3.84 (q, J=4.8), 3.69 (m), 3.66 (m), 3.57 (m), 3.45 (m,), 3.3 (d), 3.25 (d),
3.15 (m), 2.50 (m, 1H), 2.42 (m, 1H), 1.36 (t, J=7.3), 1.19 (t, J=7, 6H),
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l (e)=260 nm
Reaction mixture of 13: 1H NMR (250 MHz, [D4]CH3OH): d=7.21 (d,
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Acknowledgement
We thank the Universities of Sheffield and Leeds, White Rose Scheme
and the BBSRC (LM) for financial support.
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Received: July 30, 2003
Revised: November 17, 2003[F5405]
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