Question: What is the molecular weight of this compound's parent molecule?
 The Compound has the SMILES O=c1[nH]c2ccccc2n1CCCN1CCN(C(c2ccccc2)c2ccccc2)CC1.
Answer: 426.56
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
O=c1[nH]c2ccccc2n1CCCN1CCN(C(c2ccccc2)c2ccccc2)CC1
O=c1[nH]c2ccccc2n1CCCN1CCN(C(c2ccccc2)c2ccccc2)CC1
3-[3-(4-benzhydrylpiperazin-1-yl)propyl]-1H-benzimidazol-2-one
What is the molecular weight of this compound's parent molecule?