Integrated intensity maps (gray contours) of CH₃CCH, H₂CS, and CH₃CN toward sources G19, G08a, and G08b. Integrated intensity of CH₃OH 5_0,5 –4_0,4 ([v_lsr −3, v_lsr + 3] km s⁻¹) is shown in color scale. Gray contours show the intensity levels with uniform intervals from 5σ up to the peak flux, with the emission range (Jy beam⁻¹ km s⁻¹) indicated in the lower left corner of each panel. Colored contour in the left panel shows the location of 0.8 × peak emission of the 1.2 mm SMA continuum image. The green ellipses indicate beams of corresponding molecular lines (open) and CH₃OH 5_0,5 –4_0,4 line (filled).