Task: Answer the following question about the molecule with SMILES O1[As]2O[As]1O2.
Question: Please describe this drug.
Completion: Arsenic trioxide is a chemotheraputic agent of idiopathic function used to treat leukemia that is unresponsive to first line agents. It is suspected that arsenic trisulfide induces cancer cells to undergo apoptosis. Due to the toxic nature of arsenic, this drug carries significant health risks. The enzyme thioredoxin reductase has recently been identified as a target for arsenic trioxide.
Task: Answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
O1[As]2O[As]1O2
O1[As]2O[As]1O2
2,4,5-trioxa-1,3-diarsabicyclo[1.1.1]pentane
Please describe this drug.