Task: Answer the multiple-choice question.
Query: Which compound has a 1.639\% 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 CCOC(=O)N1CCN(C(=O)Cn2ccc3c(OC)cccc3c2=O)CC1
b CCC(C)NC(=S)Nc1ccccc1OC
Answer: b. CCC(C)NC(=S)Nc1ccccc1OC
{#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#}
CCC(C)NC(=S)Nc1ccccc1OC
CCC(C)NC(=S)Nc1ccccc1OC
1-butan-2-yl-3-(2-methoxyphenyl)thiourea