Although a rapid and significant development could be observed
in mass spectrometric instrumentation in the last five decades,
enabling one to obtain more accurate and more reliable mass spectral
data in a faster and easier way, it seems that relatively less
human effort has recently been directed towards the evaluation
and interpretation of mass spectral data in complex small-molecule
systems such as bisindole alkaloids, where no software utilities are
available for fragmentation interpretation as in the case of peptides
and proteins.