From left to right: spectra of H₂CO 3_0,3−2_0,2, HCO 3_1,3−2_1,2, HDCO 3_2,1−2_2,0, 3_2,2−2_2,1, 3_1,3−2_1,2, 3_0,3−2_0,2 and D₂CO 3_0,3−2_0,2 observed toward AFGL5142, IRAS 05358+3543, and G5.89-0.39 using the IRAM 30 m telescope (Fontani et al. 2011, 2015) and the APEX SEPIA Band 5 receiver (this work). Red and blue lines indicate the fitted different velocity components for AFGL5142 and G5.89-0.39 with fixed velocity and width. The C¹³CS N = 15−14 and J = 15−14 transition is shown in the fourth panels from the top.