User: I'm searching for the SMILES of a molecule that can be described by:
The molecule is the stable isotope of copper with relative atomic mass 62.929601, 69.2 atom percent natural abundance and nuclear spin 3/2.
Assistant: This is a molecule that fits this description: [63Cu]
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#}
[63Cu]
copper-63
The molecule is the stable isotope of copper with relative atomic mass 62.929601, 69.2 atom percent natural abundance and nuclear spin 3/2.