"I think what would be cool/interesting (and I'm guessing what cing meant to say) would be if there were a way to get that list (the scary-looking one, not the vitamins and minerals one) from some procedure done to a vegetable.'
The identification of compounds, in particular secondary
metabolites, through a metabolomic profiling approach
encounters some major difficulties. First, the number of
commercially available standards of secondary metabolites
reported to be present in a specific plant species or
tissue is low. Second, in an automated online separation,
PDA detection, MS measurement, and/or MS/MS fragmentation
of mass signals, it is difficult to meet optimized levels
for all eluting compounds. Due to overlapping compounds,
low intensity mass signals, or difficulties in the
isolation of the mass signal for MS/MS fragmentation,
the extraction of usable information for identification
purposes can be complicated. Third, the lack of dedicated
software and databases that integrate spectroscopic and
MS data limits the identification procedure to a manual
level. Nevertheless, by these means 43 metabolites could be
readily assigned in the tomato fruit extract (Tables III
and IV), leaving more to be identified. The total number
of compounds detectable by our LC-MS system is difficult
to calculate due to the presence of mass signals from
isotopes, adducts, and unintended in-source fragmentation.
It is currently not possible:
https://en.wikipedia.org/wiki/Metabolomics#Metabolome
Found some papers on Google that try to find fractions of the metabolome -- in this one, the tomato:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1533921/