Problem statement: Answer the multiple choice question.
Query: Which compound exhibits a 18.911\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any additional words.
Options:
[a] CCc1nnc(NC(=O)CN2C(=O)CCC2=O)s1
[b] CNC(=O)c1cc(C(=O)c2ccc(F)cc2Cl)c[nH]1
[c] CCCCc1c(C)c(C#N)c2[nH]c3ccccc3n2c1=O
[d] COc1ccccc1CN1C[C@@H]2C[C@@H](c3ccc(C)cc3)N3CCC[C@@]23C1=O
Answer: c. CCCCc1c(C)c(C#N)c2[nH]c3ccccc3n2c1=O
{#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#}
CCCCc1c(C)c(C#N)c2[nH]c3ccccc3n2c1=O
CCCCc1c(C)c(C#N)c2[nH]c3ccccc3n2c1=O
2-butyl-3-methyl-1-oxo-5H-pyrido[1,2-a]benzimidazole-4-carbonitrile