Q: Please describe this drug.
Constraint: The Chemical can be represented with the SMILES [Rb].
Answer: Rubidium is an element with atomic symbol Rb, atomic number 37, and atomic weight 85.468.
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
[Rb]
[Rb]
rubidium
Please describe this drug.