- Gastrointestinal tolerance of [2,2-dimethyl-6-(4-chlorophenyl-7-phenyl- 2,3-dihydro-1H-pyrrolizine-5-yl]-acetic acid in the rat. Laufer, S., Tries, S., Augustin, J., Elsässer, R., Algate, D.R., Atterson, P.R., Munt, P.L. Arzneimittel-Forschung. (1994)