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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 529 Mechlorethamine D02.455.526.728.650.594 Melphalan D02.455.526.728.650.594.690 Peptichemio ... p-Fluorophenylalanine D12.125.072.050.685.500 Melphalan D12.125.072.050.767 Thyroxine D12.125. ...
  2. LiverTox - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK547852
    ... Mebendazole Mechlorethamine Meclizine Mefenamic Acid Mefloquine Melatonin Meloxicam Melphalan Memantine Mepacrine Mepenzolate Meperidine Mepolizumab Meprobamate Mercaptopurine Meropenem ...