One question that comes to mind is what to do with molecules where isotopic number is specified for some subset of the constituent atoms (EG heavy water). This edge case is not likely come up in the near future so it is not something we need an immediate answer to.
One question that comes to mind is what to do with molecules where isotopic number is specified for some subset of the constituent atoms (EG heavy water). This edge case is not likely come up in the near future so it is not something we need an immediate answer to.