Task: Answer the multiple-choice question.
Query: Which compound exhibits a 21.134\% 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, b, or c without using any additional words.
Options:
(a) COc1ccc2oc(-c3ccccc3)c(C(=O)O)c2c1
(b) C=C(c1ccc(Br)cc1)[n+]1ccccc1.F[B-](F)(F)F
(c) Cl.OC(CN1C2=NCCN2c2ccccc21)c1ccccc1
Answer: a. COc1ccc2oc(-c3ccccc3)c(C(=O)O)c2c1
{#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#}
COc1ccc2oc(-c3ccccc3)c(C(=O)O)c2c1
COc1ccc2oc(-c3ccccc3)c(C(=O)O)c2c1
5-methoxy-2-phenyl-1-benzofuran-3-carboxylic acid