How can we generate an itp file for dihedral restraint?

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GROMACS version: 2021.4
GROMACS modification: Yes/No NO

Hello,

I would like to generate an dihedral restraints file (with the directive function, angle and force constants) for a long list a 4 atoms. it is possible to do this with a GROMACS tool or a script.

Thanks in advance

Stéphane