- Carboxyl nonsteroidal anti-inflammatory drugs are efficiently glucuronidated by microsomes of the human gastrointestinal tract. Sabolovic, N., Heydel, J.M., Li, X., Little, J.M., Humbert, A.C., Radominska-Pandya, A., Magdalou, J. Biochim. Biophys. Acta (2004)