Task: Please answer the following question about the molecule with SMILES Br.COc1ccc2c(c1)[C@]13CCCC[C@@H]1[C@H](C2)N(C)CC3.O.
Question: What is the molecular weight of this compound's parent molecule?
Completion: 271.4
Task: Please answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
Br.COc1ccc2c(c1)[C@]13CCCC[C@@H]1[C@H](C2)N(C)CC3.O
Br.COc1ccc2c(c1)[C@]13CCCC[C@@H]1[C@H](C2)N(C)CC3.O
(1S,9S,10S)-4-methoxy-17-methyl-17-azatetracyclo[7.5.3.01,10.02,7]heptadeca-2(7),3,5-triene;hydrate;hydrobromide
What is the molecular weight of this compound's parent molecule?