Organic Letters
Letter
Notes
The authors declare no competing financial interest.
ACKNOWLEDGMENTS
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We are grateful for financial support from the National Natural
Science Foundation of China (Nos. 21672132 and 21502110)
and the Fundamental Funds Research for the Central
Universities (No. GK201503034). This research was also
supported by the Fundamental Research Funds for the Central
Universities (No. 2016CSZ004).
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