1 INTRODUCTION

2 OBSERVATIONS AND DATA REDUCTION

3 RESULTS
3.1 Line identification
3.2 Line profiles
3.3 Analysis
3.4 Isotopic ratios

4 DISCUSSION
4.1 Uniform molecular abundances and excitation conditions in the nuclei of galaxies
4.2 Tracing the UV and X-ray induced chemistry in galactic nuclei

5 CONCLUSIONS