3UD9:
reference: Divergent synthesis of 48 heparan sulfate-based disaccharides and probing the specific sugar-fibroblast growth factor-1 interaction., Hu YP, Zhong YQ, Chen ZG, Chen CY, Shi Z, Zulueta MM, Ku CC, Lee PY, Wang CC, Hung SC, J Am Chem Soc. 2012 Dec 26;134(51):20722-7. doi: 10.1021/ja3090065. Epub 2012 Dec, 14. PMID: 23240683

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