Fig. 3.

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Column density of C6H5CN versus column density of HC7N for all the clouds where C6H5CN has been detected or searched for. The colors indicate different locations in the sky. Values were taken from Cabezas et al. (2022) and Cernicharo et al. (2021a) for TMC-1, from Friesen et al. (2013) and Burkhardt et al. (2021b) for the three clouds in Serpens and L1521F, and from the present work elsewhere.
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