Selected transitions of the gGt conformer of cysteamine in the spectral survey toward the G+0.693–0.027 molecular cloud. Left panel: brightest spectral feature of gGt-cysteamine, composed of six blended transitions at 86.05–86.06 GHz (4₄–3₃, E_lo = 3.89 cm^–1), predicted by the LTE spectrum obtained considering the upper limit of the column density (see Table 4). These gOt-cysteamine transitions appear heavily blended with a much brighter line produced by HC¹⁵N(1–0) at 86.05496 GHz. Right panel: brightest predicted spectral feature of gGt-cysteamine (composed by three transitions at 94.124 GHz; E_lo = 6.93 cm^–1; Table 4) that is not blended with emission from other molecules. We used these transitions to compute the upper limit for the column density of gGt-cysteamine (Table 4). In both panels, the gray histogram shows the observed spectrum, the blue curve shows the contribution of all the molecules previously identified in the molecular cloud G+0.693–0.027, and red plots the LTE spectrum of the gGt conformer of cysteamine obtained with the upper limit for its column density (Table 4).