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Fig. 6


Rotational diagrams of CH3OH from the single dish data (first column), for CH3OH from the SMA spectra extracted with a 2 mask (second column), and CH3CN from the single-dish data (third column), and CH3CCH (fourth column) and for the sources NGC 7538 IRS9 (first row), W3 IRS5 (second row), and AFGL490 (third row).

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