Molecular abundances relative to H₂ towards IRAS 16293-2422 (Schöier et al. 2002; Maret et al. 2005; Jaber et al. 2014; Taquet et al. 2014; Majumdar et al. 2016) and hot cores from Bisschop et al. (2007) vs. that of G328.2551-0.5321. The diamond represents the COMs in the hot cores. The small symbols are used to show each hot core. The larger symbol shows the averaged value. The blue data points represent the cold component of the envelope, and red represents the warm component of the envelope. The grey shaded region corresponds to a factor of 5 scatter from the one-to-one relation.