Sakurai’s Object H¹²CN(J = 4→3), H¹³CN(J = 4→3) and CO(J = 3→2) line emission. The green line is the spectrum of the emission line detected previously with APEX. The blue line is the spectrum observed with ALMA. The spectral resolutions of the APEX and ALMA observations are 20 km s⁻¹ and 0.8 km s⁻¹, respectively. The bottom axis indicates the local standard of rest velocity and the top axis indicates the velocity offset from the systemic velocity assumed to be 125 km s⁻¹.