Task: Please create a description for a molecule based on its representation.
Molecule SMILES: [203Tl]
Constraint: Answer the question with full sentences.
Result: The molecule is the stable isotope of thallium with relative atomic mass 202.9723. The least abundant (29.524 atom percent) isotope of naturally occurring thallium.
Task: Please create a {#text |!}description for a molecule{# based on its representation|!}.
{#Molecule |!}{SMILES__description}: {SMILES#}
Constraint: Answer the question with {#full|complete!} sentences.
Result: {description#}
[203Tl]
thallium-203
The molecule is the stable isotope of thallium with relative atomic mass 202.9723. The least abundant (29.524 atom percent) isotope of naturally occurring thallium.