Task: Answer the MCQ question.
Question: Which drug has a 2.263\% 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] CCOC(=O)c1cnc(-n2nc(C)cc2C)nc1NNc1nc(-c2ccccc2)cc(-c2ccccc2)n1
[b] Cc1cc(C)c2cc(C#N)c(N3CCCC3)nc2c1
[c] CSCCC(NC(=O)c1c(C)oc2c1CCCC2)C(=O)O
Answer: b. Cc1cc(C)c2cc(C#N)c(N3CCCC3)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#}
5,7-dimethyl-2-pyrrolidin-1-ylquinoline-3-carbonitrile