1. Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc.
2. Ridgefield
3. USA
4. Department of Chemistry
5. University of Pennsylvania Philadelphia
6. Apeiron Synthesis S.A. Wroclaw Technology Park ul
7. 54-427 Wrocław
8. Poland
9. Astatech BioPharmaceutical Corporation
10. Chengdu