Task: Answer the multiple choice question.
Query: Which compound exhibits a 18.191\% 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 C=CCNc1ncnc2ccccc12
b CCOc1cc(C(=O)Nc2cccc3ncccc23)cc(OCC)c1OCC
c O=C(CCS(=O)(=O)c1ccccc1)Nc1nc2cc3c(cc2s1)OCCO3
Answer: a. C=CCNc1ncnc2ccccc12
{#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#}
C=CCNc1ncnc2ccccc12
C=CCNc1ncnc2ccccc12
N-prop-2-enylquinazolin-4-amine