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The astronomical lines have been reported by
(1) J. Cernicharo, C. Cabezas, J. R. Pardo, M. Agúndez,
O. Roncero, B. Tercero, N. Marcelino, M. Guélin, Y. Endo,
and P. de Vicente,
2023, Astron. Astrophys. 672, Art. No. L13.
The quartic distortion parameter was kept fixed to the value
from a quantum chemical calculation. The uncertainty of one line was doubled.
The calculations should be quite reliable up to about 90 GHz.
The dipole moment was taken from a quantum chemical calculation
in (1).
Its value should be viewed with some caution.
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