Problem statement: Answer the MCQ question.
Query: Which compound exhibits a 1.847\% human ether-à-go-go related gene (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) COC(=O)CN1C(=O)C2(OCCCO2)c2ccccc21
(b) c1ccc2nc(-c3nccs3)ccc2c1
Answer: b. c1ccc2nc(-c3nccs3)ccc2c1
{#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#}
c1ccc2nc(-c3nccs3)ccc2c1
c1ccc2nc(-c3nccs3)ccc2c1
2-quinolin-2-yl-1,3-thiazole