1. Introduction  
2. Observations and Data Reduction  
3. Results  
3.1. Line Identifications  
3.2. Newly Detected Lines  
3.3. Unidentified Lines  
4. Discussion  
4.1. Rotational Temperatures and Column Densities  
4.2. Fractional Abundances Relative to \(H_{2}\)  
4.3. The RADEX Non-LTE Modeling for \(NH_{3}\): The Kinetic Temperature  
4.4. Abundance Differences among \(^{13}C\) Isotopologues of \(HC_{5}N\) and the \(^{12}C/^{13}C\) Ratio in IRC+10216  
4.5. Comparison of the IRC+10216 and TMC-1 Chemistry  
5. Summary and Conclusions