Task: Please generate a SMILES based on the description below.
Description: The molecule is the stable isotope of selenium with relative atomic mass 76.919915, 7.60 atom percent natural abundance and nuclear spin 1/2.
Result: [77Se]
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {SMILES#}
selenium-77
The molecule is the stable isotope of selenium with relative atomic mass 76.919915, 7.60 atom percent natural abundance and nuclear spin 1/2.