Question: What is the molecular weight of this compound's parent molecule?
 The Molecule has the SMILES [133Xe].
Result: 131.29
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
[133Xe]
[133Xe]
xenon-133
What is the molecular weight of this compound's parent molecule?
131.29