Task: Answer the multiple-choice question.
Query: Which drug exhibits a 2.736\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
[a] O=C(CSc1ccc(Cl)cc1)N1CCCC1
[b] COc1cc(C2C3=C(Nc4nc(N)[nH]c(=O)c42)c2ccccc2C3=O)ccc1O
Answer: a. O=C(CSc1ccc(Cl)cc1)N1CCCC1
{#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#}
O=C(CSc1ccc(Cl)cc1)N1CCCC1
O=C(CSc1ccc(Cl)cc1)N1CCCC1
2-(4-chlorophenyl)sulfanyl-1-pyrrolidin-1-ylethanone