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Table 1
Summary of IRAM 30 m observations towards the W51 e1/e2 hot molecular core used in this work.
| Date | RAJ2000 | DecJ2000 | Frequency coverage |
| 19h23m | 14°30′ | (GHz) | |
|
|
|||
| 2012 Apr. 25 | 43.90s | 32.0′′ | 88.83–96.60 |
| 104.51–112.29 | |||
|
|
|||
| 2012 Dec. 13 | 43.90s | 34.8′′ | 99.70–106.30 |
| 238.20–245.98 | |||
|
|
|||
| 2015 Dec. 9 | 43.90s | 32.0′′ | 134.47–142.25 |
| 150.15–157.90 | |||
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