<p>Senecionine <a rel="nofollow" class="external text" href="https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=5281733">PubChem cid = 5281733</a>
</p><p>Essential structural features
</p>
<ul><li>Red box: esterified allylic hydroxyl group at C9</li>
<li>Green box: esterified hydroxyl group at C7</li>
<li>Blue box: C1-C2 double bond</li>
<li>Up orange box: necic acid</li>
<li>Bottom orange box: necine base</li></ul><dl><dd><ul><li>R. Lindigkeit, A. Biller, M. Buch, H.-M. Schiebel, M. Boppre and T. Hartmann <i>The two Faces of Pyrrolizidine Alkaloids: the Role of the Tertiary Amine and its N-Oxide in Chemical Defense of Insects with Acquired Plant Alkaloids</i> European Journal of Biochemistry <b>245</b>, 3, (1997), pages 626–636 <a href="//doi.org/10.1111/j.1432-1033.1997.00626.x" class="extiw" title="doi:10.1111/j.1432-1033.1997.00626.x">doi:10.1111/j.1432-1033.1997.00626.x</a> <a rel="nofollow" class="external text" href="http://onlinelibrary.wiley.com/doi/10.1111/j.1432-1033.1997.00626.x/pdf">Free PDF</a></li>
<li>Dorothee Langel, Dietrich Ober and Pieter B. Pelser <i>The evolution of pyrrolizidine alkaloid biosynthesis and diversity in the Senecioneae</i> Phytochemistry Reviews <b>10</b>, 1, (2011), pages 3-74, <a href="//doi.org/10.1007/s11101-010-9184-y" class="extiw" title="doi:10.1007/s11101-010-9184-y">doi:10.1007/s11101-010-9184-y</a> <a rel="nofollow" class="external text" href="http://www.springerlink.com/content/t8144471462vl544/fulltext.pdf">Free PDF</a></li></ul></dd></dl>
Jacopo Werther
<span class="int-own-work" lang="en">Own work</span>