Fast-atom bombardment mass spectrometry of guanidine fungicides and related compounds: the formation of ' [MH+12] POT.+ 'Ions from secondary amines and from 1,1'-IMINODIOCTAMETHYLENEDIGUANIDINE, AND OF ' [mh+24] pot.+' Ions from 9-aza-1, 17-diaminoheptadecane - Hudson, H R; Lavorenti, A; Pianka, M; Reid, C (Chemistry and Industry, 1991)