Task: Answer the multiple choice question.
Query: Which compound exhibits a 2.766\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
[a] CCn1nc(C)cc1C(=O)N1CCCC(N2CCN(c3ccccc3OC)CC2)C1
[b] CCOC(=O)c1sc2nc(C)nc(Nc3ccc(OC)cc3)c2c1C
Answer: b. CCOC(=O)c1sc2nc(C)nc(Nc3ccc(OC)cc3)c2c1C
{#Task|Problem statement!}: Answer the {#multiple choice|multiple-choice|MCQ!} question.
{#Question|Query!}: Which {#compound|drug!} {#has|exhibits!} a {herg_central_at_1uM#}{herg_central_at_1uM__units} {herg_central_at_1uM__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_1uM%}
Answer: {%multiple_choice_result}. {SMILES#}
CCOC(=O)c1sc2nc(C)nc(Nc3ccc(OC)cc3)c2c1C
CCOC(=O)c1sc2nc(C)nc(Nc3ccc(OC)cc3)c2c1C
ethyl 4-(4-methoxyanilino)-2,5-dimethylthieno[2,3-d]pyrimidine-6-carboxylate