Task: Answer the multiple-choice question.
Query: Which compound has a 18.677\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, c, d, or e without using any other words.
Options:
a. Cc1nc2nc(-c3ccccc3)cc(=O)n2[nH]1
b. Nc1cc(=O)[nH]c(=O)n1CC1CC1
c. COc1cc(C)c(S(=O)(=O)n2c([N+](=O)[O-])cnc2C)cc1C
d. Cc1cc(C)n2cc(CSc3nc4cc(Cl)ccc4o3)nc2n1
e. COC(=O)C1=C[C@@H](C(=O)OC)[C@@H]2C3=C(C(=O)[C@@]2(C)NC(=O)c2ccccc2)[C@H](c2ccccc2)n2c(=O)n(-c4ccccc4)c(=O)n2[C@@H]3C1
Answer: b. Nc1cc(=O)[nH]c(=O)n1CC1CC1
{#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#}
Nc1cc(=O)[nH]c(=O)n1CC1CC1
Nc1cc(=O)[nH]c(=O)n1CC1CC1
6-amino-1-(cyclopropylmethyl)pyrimidine-2,4-dione