Is morphine-3-glucuronide of therapeutic relevance?

@article{Skarke2005IsMO,
  title={Is morphine-3-glucuronide of therapeutic relevance?},
  author={Carsten Skarke and Gerd 7 Geisslinger and J{\"o}rn L{\"o}tsch},
  journal={Pain},
  year={2005},
  volume={116 3},
  pages={177-80}
}