@pckroon at the moment is is not required for the rs_isomer as the nodes only get annotated with '@' or '@@'. However, in the current code it is not possible to have the chiral center using the ring bond accounting. That's why it is not needed at the moment.
The ring thing is a bit tricky because we just strip the smiles string of these characters. Doing the ring thing would actually require looking up the index belonging to a ring atom and matching it.
@pckroon at the moment is is not required for the rs_isomer as the nodes only get annotated with '@' or '@@'. However, in the current code it is not possible to have the chiral center using the ring bond accounting. That's why it is not needed at the moment.
The ring thing is a bit tricky because we just strip the smiles string of these characters. Doing the ring thing would actually require looking up the index belonging to a ring atom and matching it.