Notes. ^(a) Range of upper energy levels of all transitions in our frequency coverage with an A_ij above 10⁻⁴ s⁻¹, except for methanol and methyl formate, where the lowest energy transition detected has an A_ij of 9.87 × 10⁻⁵ s⁻¹ and 2.68 × 10⁻⁵ s⁻¹, respectively.^(b)The label e corresponds to the inner envelope, s to the accretion shocks, and c to the innermost central regions that could have contribution from both the outflow and the accretion disk. ^(c) Spectroscopic parameters are more uncertain at this frequency range (Ordu et al. 2019). ^(d) The identification is based on only one to two unblended transitions. ^(e)Formic acid contains less than 6 atoms, it is, however, the simplest organic acid and thus will be discussed together with the listed interstellar COMs.