Three-dimensional mesh view of the model of the molecular envelope of V370 And, which is defined by a sphere whose equatorial plane is inclined by ∼25° with respect to the plane of the sky, attached to a biconical structure. Left: view from the direction defined by west in the plane of the sky (the observer is on the left). The Y and Z axes are represented by green and blue, respectively (positive directions are in the clockwise direction). Right: resulting synthetic spectra for both models, the oblate spheroid (red) and the sphere (blue), both attached to the same biconical structure, and observation (black) for the ¹²CO J = 2–1 transition toward V370 And. We note the similarity between the synthetic spectra for both models.