Calculating the metabolome size of species by genome-guided reconstruction of metabolic pathways misses all products from orphan genes and from enzymes lacking annotated genes. Hence, metabolomes need to be determined experimentally. Annotations by mass spectrometry would greatly benefit if peer-reviewed public databases could be queried to compile target lists of structures that already have been reported for a given species. We detail current obstacles to compile such a knowledge base of metabolites.

In all, 120 compounds, their VDss (volume-of-distribution in steady-state) Fu (fraction unbound in human plasma) values have been given. The same have been provided here in .sdf and .txt files.