Identification of histrionicotoxins by GC-MS and GC-FTIR: Photo- and chemical-artefacts and revised 13C NMR assignments
摘要:
GC-mass and GC-FTIR spectral data together permit the rapid identification of the histrionicotoxin (HTX) alkaloids. C-13-NMR chemical shifts (delta-c) are reported for HTX 235A and revised delta-c are tabulated for nine HTXs and a perhydro-derivative. A butylboronic acid HTX derivative offers GC-MS and GC-FTIR advantages. Artefactual trans diene photoisomers of the HTX class are described as are formaldehyde condensation products. Two new HTX alkaloids 261 and 265E, are characterized by mass and FTIR spectra.