G. Reznicek et al., ELECTRON IMPACT-IONIZATION AND CHEMICAL-IONIZATION MASS-SPECTROMETRY OF NATURALLY-OCCURRING SESQUITERPENE LACTONES FROM ACHILLEA SPP, Phytochemical analysis, 8(1), 1997, pp. 9-13
The electron impact-mass spectra as well as the complementary chemical
ionization-mass spectra (with the reactant gas ammonia) of various st
ructural types of sesquiterpene lactones isolated from Achillea specie
s are discussed in respect to the important information either gained
by fragmentation patterns or by the quasimolecular ions. (C) 1997 by J
ohn Wiley & Sons, Ltd.