Perturbations in the quartets of R-branch K_a = 0,1 transitions in the 0⁻ substate for the ground state of glycinamide. At these J values, the four possible transitions are completely resolved, with the pattern of the two stronger, central a-dipole transitions, flanked by weaker b-dipoletransitions (as in the bottom and top traces). The transitions are marked by the value of K_a and transition type, and the two middle traces show significant deviations in the patterns. Triangle markers indicate transitions in the fitted data set. While this is an interesting spectroscopic curiosity, it is noted that such lowest K_a transitions are the first choice in astrophysical searches for a new molecule.