Erratum to: Nat. Prod. Bioprospect. (2015) 5:77–82 DOI 10.1007/s13659-015-0054-6
In the HTML version of the original publication, the graphical abstract was inadvertently omitted. The graphical abstract is given in this erratum.

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Footnotes
The online version of the original article can be found under doi:10.1007/s13659-015-0054-6.
Contributor Information
Xian Li, Email: xianlikm@163.com.
Gang Xu, Email: xugang008@mail.kib.ac.cn.
