convallamarin
noun
                                                                                                                            
                                                            con·val·la·mar·in
                    
                                                                                                              
                                                                                                                                  kən-ˌval-ə-ˈmar-ən 
                                                                                                                                  ˌkän-və-ˈlam-ə-rən 
                                                      
                                                          
            
                                
              
          
                                                      : a bitter poisonous glycoside extracted from the dried rhizome and roots of the lily of the valley                                      
                
                    
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  Merriam-Webster unabridged




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