Problem statement: Answer the MCQ question.
Query: Which compound has a 4.563\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
(a) O=C(NCCO)Nc1ccc2nc(-c3ccco3)c(-c3ccco3)nc2c1
(b) O=c1ccn([C@@H]2O[C@H](CO)[C@@H](O)[C@H]2O)c(=O)[nH]1
(c) CCOC(=O)c1ccc(S(=O)(=O)N2CCN(CC(=O)NC(=O)NC(C)(C)C)CC2)cc1
(d) Cc1nn(-c2nnc(NC3CCCCC3)nn2)c(C)c1Br
Answer: a. O=C(NCCO)Nc1ccc2nc(-c3ccco3)c(-c3ccco3)nc2c1
{#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#}
1-[3-(furan-2-yl)-2-(furan-2-yl)quinoxalin-6-yl]-3-(2-hydroxyethyl)urea