Molecular Kennicutt-Schmidt relation for J1023+1952 compared to TDGs from the literature (compiled by Lisenfeld et al. 2016). The orange squares represent our measurements of the total molecular gas, whereas the blue triangles correspond to the flux in GMCs identified with CPROPS, associated with compact molecular emission. The small squares and triangles differentiate the north from the south of the TDG (as defined in Fig. 1). For reference, the open grey circles in the background show the kpc-scale measurements in spiral galaxies from Bigiel et al. (2008); the solid line represents their best fit to that sample and the dashed line its standard deviation. The molecular gas literature data for TDGs comes from single-dish telescopes except for the circles marked with an additional cross.