Observed ARO 12 m spectra toward IRAS 16293E shown in black and Gaussian fits as red curves. Spectra without Gaussian fits were considered nondetections, and upper limits were derived. The vertical red lines are centered at v_lsr of 3.8 km/s, and the gray horizontal lines show the 1 σ noise (RMS) level. From top left to bottom right: ¹³CH₃OH spectra offset by 50 mK, CH₂DOH spectra offset by 100 mK, CHD₂OH spectra offset by 50 mK, CH₃CHO spectra offset by 100 mK, CH₂CHCN spectra (nondetections) offset by 50mK, HCOOCH₃ spectra offset by 25mK, and a single CH₃OCH₃ spectrum (nondetection).