Task: Please generate a molecule SMILES based on the description.
Description: 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.
Result: [57Fe]
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {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.