Continuum (1.3 mm) and J = 2 − 1 ¹³CO, C¹⁸O, and C¹⁷O line emission towards AFGL 5385. Top: Maps of the continuum (colour map) and high-velocity line emission (contours). The continuum peaks at $\alpha ={17}^{\text{h}}{47}^{\text{m}}13\stackrel{\text{s}}{.}499$ and $\delta =-{24}^{°}12\prime 51\stackrel{″}{.}617$. The full white line shows the continuum emission at 10%, 30%, 50%, and 70% of the peak value. The full colored lines show emission in the ¹³CO J = 2 − 1 integrated over the spectral intervals marked in grey in the line spectra. Magenta and cyan contours mark red-shifted and blue-shifted emission, respectively, at 10%, 30%, 50%, and 70% of the peak values of 0.068 (red-shifted) and 0.070 (blue-shifted) Jy beam⁻¹ × km s⁻¹. Bottom: Source-integrated spectra of the ¹³CO J = 2 − 1, C¹⁸O J = 2 − 1, and C¹⁷O J = 2 − 1 lines.