Task: Answer the MCQ question.
Question: Which drug exhibits a -2.190% hERG inhibition at 10uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
[a] O[C@H]1COC2C1OC[C@@H]2O
[b] CC(C)CCNC(=O)C1CCN(C(=O)N(C)C)CC1
Answer: a. O[C@H]1COC2C1OC[C@@H]2O
{#Task|Problem statement!}: Answer the {#multiple choice|multiple-choice|MCQ!} question.
{#Question|Query!}: Which {#compound|drug!} {#has|exhibits!} a {herg_central_at_10uM#}{herg_central_at_10uM__units} {herg_central_at_10uM__names__noun}?
Constraint: You must select none, one or more options from {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%herg_central_at_10uM%}
Answer: {%multiple_choice_result}. {SMILES#}
O[C@H]1COC2C1OC[C@@H]2O
O[C@H]1COC2C1OC[C@@H]2O
(3S,6S)-2,3,3a,5,6,6a-hexahydrofuro[3,2-b]furan-3,6-diol