1. INTRODUCTION

2. OBSERVATIONS

2.1. Overview, sources and strategy

2.2. MDSCC observations

2.3. IRAM observations

3. RESULTS

3.1. Overview

3.2. Some examples of individual features

3.3. Identification of other spectral lines

4. DISCUSSION

4.1. The highest vibrationally excited lines

4.2. About the emitting region

4.3. "Bonus" thermal lines

5. CONCLUSIONS