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Fig. 2

Fig. 2 Refer to the following caption and surrounding text.

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Rotational diagrams obtained using MADCUBA for 13CH3OH, CH3CCH, CH3CHO, CH3CN, and CH3SH. Magenta empty squares indicate the data points, while the green lines show the best fitting found by MADCUBA. In all panels, the corresponding species is indicated together with the inferred excitation temperature, Tex, and total column density, Ntot.

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