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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 500 Methoxydimethyltryptamines D03.633.100.473.914.481 Melatonin D03.633.100.473.914.700 Psilocybin D03. ... 445.573.666.500 Methoprene D06.472.506 Melatonin D06.472.699 Peptide Hormones D06.472.699. ...
  2. LiverTox - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK547852
    ... Marijuana Mavyret Mebendazole Mechlorethamine Meclizine Mefenamic Acid Mefloquine Melatonin Meloxicam Melphalan Memantine Mepacrine Mepenzolate Meperidine Mepolizumab Meprobamate ...