Task: Answer the multiple choice question.
Query: Which drug exhibits a 13.018\% 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 or b without using any additional words.
Options:
a: CCN1C(Nc2ccccc2)=NC[C@@H]1C
b: COc1cccc(NC(=O)CN2CCc3ccccc3C2)c1
Answer: a. CCN1C(Nc2ccccc2)=NC[C@@H]1C
{#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#}
CCN1C(Nc2ccccc2)=NC[C@@H]1C
CCN1C(Nc2ccccc2)=NC[C@@H]1C
(5S)-1-ethyl-5-methyl-N-phenyl-4,5-dihydroimidazol-2-amine