Continued: Observed spectra of the molecules, towards L1551-IRS5, listed in Table A.4 (in T_MB scale). In theo-c-C₃H₂ spectrum the velocity scale is centered on the brightest (63 D²) hyperfine component (vertical blue line) at 218449.4 MHz; the vertical red lines indicate the offset in velocity of the fainter components (21 D² at 216448.8 MHz). In the CH₃OH spectrum the velocity scale is centered on the CH₃OH emission at 231281.1 MHz; the vertical red line indicates possible contamination due to CH₃CHO at 231278.5 MHz.