1. Introduction

2. Observations and Data Reduction
2.1. HIFI
2.2. SMA

3. Data Analysis

4. Results
4.1. Simple O-bearing molecules
4.2. Complex O-bearing molecules
4.3. NH-bearing molecules
4.4. N- and O-bearing molecules
4.5. Cyanide molecules
4.6. S-bearing molecules
4.7. Carbon and hydrocarbons
4.8. Halogen molecules

5. Discussion
5.1. Molecular abundances in the hot core
5.2. Kinematics and chemistry of the Sgr B2 envelope

6. Conclusion