Metabolomics: what you see is what you extract.

@article{Choi2014MetabolomicsWY,
  title={Metabolomics: what you see is what you extract.},
  author={Young H Choi and Robert Verpoorte},
  journal={Phytochemical analysis : PCA},
  year={2014},
  volume={25 4},
  pages={289-90}
}