title: Mass spectroscopy of natural products. III--Mass spectrometric comparison of lysergic acid and 9,10-dihydrolysergic acid.
abstract: The influence of the 9,10-double bond in the ergoline skeleton on the fragmentation behaviour of lysergic acid and 9,10-dihydrolysergic acid is discussed. The main fragmentation pathways were determined using high resolution mass spectrometry and metastable ion studies. The 70 eV electron impact spectra are compared with the 12 eV electron impact spectra and the negative ion mass spectra (2--4 eV).
mesh_terms: D004873:Ergolines / Q000031:analogs & derivatives; D008401:Gas Chromatography-Mass Spectrometry; D007477:Ions; D008237:Lysergic Acid / Q000031:analogs & derivatives; D013058:Mass Spectrometry / Q000379:methods*
chemical_list: D004873:Ergolines; D007477:Ions; D008237:Lysergic Acid