User: I'm searching for the SMILES of a molecule that can be described by:
The molecule is the stable isotope of iron with relative atomic mass 56.935399, 2.1 atom percent natural abundance and nuclear spin 1/2.
Assistant: This is a molecule that fits this description: [57Fe]
User: I'm {#searching|looking!} for the {SMILES__description} of a molecule that can be described {#by|as!}:
{description#}
Assistant: This is a molecule that fits {#your|this!} description: {SMILES#}
iron-57
The molecule is the stable isotope of iron with relative atomic mass 56.935399, 2.1 atom percent natural abundance and nuclear spin 1/2.