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  1. pdf2017MeshTreesWithChangesShown.pdf 
    https://www.nlm.nih.gov/.../2017MeshTreesWithChangesShown.pdf
    ... new trees together - all Tree - heading Norbornanes Bornanes Camphor Mecamylamine Toxaphene Pyrethrins Allethrin Permethrin Thymol Bromthymol Blue ... Thenoyltrifluoroacetone Butyrophenones Azaperone Benperidol Droperidol ... Camphor Cyclohexanones Tiletamine Hexanones Methyl n-Butyl Ketone Ketone ...
  2. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... Bornanes D02.455.849.575.781.234.326 Camphor D02.455.849.575.781.500 Mecamylamine D02. ... D02.522.352.867 Trifluperidol D02.522.376 Camphor D02.522.400 Cyclohexanones D02.522.400.850 ...
  3. pdf2016MeshTree.pdf 
    https://www.nlm.nih.gov/mesh/2016/download/2016MeshTree.pdf
    ... Bornanes D02.455.849.575.781.234.326...........................................Camphor D02.455.849.575.781.500...........................................Mecamylamine D02. ...
  4. Colonialism and the Plant Hunters – Circulating Now from the NLM Historical Collections 
    https://circulatingnow.nlm.nih.gov/...onialism-and-the-plant-hunters
    ... of valuable spices such as cinnamon, cloves, and camphor in Asia. In the West, colonial powers hoped ... ginger to coconut and aloe. He showed that camphor came from the sap of a tree and ...