Notes.^(*) The nuclear spin degeneracy $g_{\text{ns}}^{(\text{i})}$ in this work is considered the same than in CDMS catalog (Endres et al. 2016). ^(a)The rotational states of a symmetric top are labeled by the quantum numbers J_K, where J is the rotational angular momentum and the K is the projection of the rotational angular momentum along the z- molecule-fixed axis. The symmetry of the rotational states is characterized by the values of K and J. ^(b)The symmetry labeling of the rotational states. The states K = 0 with even or odd J have symmetry A₁ or A₂, respectively. ^(c)Although the three symmetry labelings A₁ , A₂ and E have the same nuclear spin degeneracy (in this work, 𝑔_ns=2), the rotational states with quantum number K = 3n (n ≠ 0 is an integer) are K-type doublets that are degenerate and, therefore, their nuclear spin degeneracy takes a value double than the states with K = 0 or K = 3n ± 1.