3EIO:
reference: Synthesis and biological evaluation of homopiperazine derivatives with beta-aminoacyl group as dipeptidyl peptidase IV inhibitors., Ahn JH, Park WS, Jun MA, Shin MS, Kang SK, Kim KY, Rhee SD, Bae MA, Kim KR, Kim SG, Kim SY, Sohn SK, Kang NS, Lee JO, Lee DH, Cheon HG, Kim SS, Bioorg Med Chem Lett. 2008 Dec 15;18(24):6525-9. Epub 2008 Oct 21. PMID: 18996694

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