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| ● paper help, TL 1984, thanks | ● 求paper, Tetrahedron Letters, 1983, 5425-5428 | | ● 再求tetrahedron letters | ● paper help | | ● paper help | ● Paper helps please, thanks a lot! | | ● paper help -tetrahedron letters | ● paper help | | ● paper help | ● paper help | | ● help for paper from Tetrahedron Letters (paper in press)-_T | ● Paper Help, TL 1989, thanks | | ● Paper Help!!! | ● Paper Help, TL 1977, Thanks | | ● Paper help, thanks! | ● tetrahedron letters |
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