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. 2019 Dec 21;18(1):12. doi: 10.3390/md18010012

Figure 1.

Figure 1

Natural sources of potential therapeutics. (A) The needles and berries of a Pacific yew, characteristic of the tree from which paclitaxel was originally extracted. (B) Chemical structure of paclitaxel. (C) Shell of the worm-hunting snail, Conus regius, from which RgIA was originally characterized. (D) Structure of the short 13-amino-acid peptide RgIA isolated from Conus regius. Image sources: (A) Yew Needles and Berries, National Cancer Institute Visuals Online, no. AV-9100-3761. (C) Conus regius photograph by Peter Huynh.