Top panels: integrated intensities of the three representative molecular lines that were not blended with any other, showcasing the three visually identified regions they trace within the IRAS4A2 disk: C₂H₃CN, CH₃CDO, and CH₃OCHO. The white contours show the 30 σ to 60 σ levels of the continuum emission, and the synthesized beams are indicated in the lower-left corner of each image. Middle panels: P-V diagrams of CH₃CDO and CH₃OCHO, extracted along a cut perpendicular to the outflow axis. The dashed green curve represents the Keplerian rotation model from H₂CO, while white contours indicate emission levels from 1.5 σ to 3 σ, based on the Band 6 line data. Bottom panel: moment 1 (M1) map of CH₃OCHO, indicating the velocity structure across the emitting region.