Task: Answer the multiple choice question.
Question: Which drug exhibits a 19.200\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, c, d, or e without using any additional words.
Options:
(a) O=C1/C(=C/c2ccc([N+](=O)[O-])cc2)CCC1C1CCCC1
(b) CCOC(=O)c1cn2cccnc2n1
(c) COc1ccc(-c2nc3c(s2)CCc2onc(-c4ccc(Br)cc4)c2-3)cc1
(d) COc1ccc(S(=O)(=O)N2CCCCC2)cc1NC(=O)CCc1nc2ccccc2c(=O)[nH]1
(e) COc1cccc(NC(=S)NC(=O)c2cncc(Br)c2)c1
Answer: b. CCOC(=O)c1cn2cccnc2n1
{#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)c1cn2cccnc2n1
CCOC(=O)c1cn2cccnc2n1
ethylimidazo[1,2-a]pyrimidine-2-carboxylate