892
S.K. Ghosh et al. / Tetrahedron 64 (2008) 883e893
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(100), 264 (50), 220 (5), 101 (10); m/e (ESI) calcd for
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Acknowledgements
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Authors thank the NIH [NS38049], NIH [AI57153-05], and
UW-Madison for funding.
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