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. 2016 Apr 26;7:509. doi: 10.3389/fpls.2016.00509

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Copyright © 2016 Ilc, Parage, Boachon, Navrot and Werck-Reichhart.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Examples of iridoids (aucubin and catalpol) and iridoid-derived alkaloids, and the plants producing them. Photos by Hectonichus/CC BY-SA 3.0 (Aucuba japonica), H. Zell/GFDL 2.0 (Catalpa bignonioides), Forest and Kim Starr/CC BY 3.0 (Cinchona pubescens), Wikimedia Commons (Catharanthus roseus and Camptotheca acuminata).