Fig. 1

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(top) Wavelength distribution of the flux of the MDHL used for irradiation. (bottom) VUV absorption cross sections for CO (Cruz-Diaz et al. 2014a) as well as ethanol and CH3CHO (Hrodmarsson & van Dishoeck 2023) in the lamp region. 1 Mb = 10−18 cm2. Note that for the two COMs, these correspond to the gas-phase cross sections, and so they should not be quantitatively compared to CO.
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