by means of a histochemical reaction using formaldehyde vapour ( falck and owman 1965 ) , biogenic monoamines and precursor substances , i.e. , l-dopa , dopamine , noradrenaline , adrenaline , 5-hydroxytryptophan and 5-hydroxytryptamine , may be converted into fluorophores with specific spectral characteristics , i.e. , the emission spectrum , excitation spectrum and fading curve .
C0028351
noradrenaline
C0014563
adrenaline