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Table 4
Isotopologue line intensity ratios in the observed sources.
| Species | IRAS 20126+4104 | IRAS 18089-1732 | G31.41+0.31 |
|
|
|||
| CH3OH/13CH3OH | >6 | >18 | 6 |
| CH3CN/CH313CN | >65 | 4.7 | 4.5 |
Notes.Lower limits are those for which the 13C-isotopologue was not detected.
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