1. Introduction

2. Observations and Ancillary Data

3. Results – Molecules in Different Environmental Regions in the Centre of NGC 6946

4. The Environmental Variability of the Star Formation Rate in NGC 6946

5. Results - Line Ratios and Relationships Among Molecular Species

6. Implications for Spectroscopic Studies of Other Galaxies – From Bulk Molecular Gas to Dense Gas

7. Conclusion