4ASG:
reference: Synthesis of 19-substituted geldanamycins with altered conformations and their binding to heat shock protein Hsp90., Kitson RR, Chang CH, Xiong R, Williams HE, Davis AL, Lewis W, Dehn DL, Siegel D, Roe SM, Prodromou C, Ross D, Moody CJ, Nat Chem. 2013 Apr;5(4):307-14. doi: 10.1038/nchem.1596. Epub 2013 Mar 10. PMID: 23511419

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