Task: Answer the multiple-choice question.
Question: Which compound exhibits a 18.948\% 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 other words.
Options:
a: Cc1cccc(NC(=O)c2ccc3c(c2)C(=O)N(c2ccccc2C)C3=O)n1
b: O=C(COc1ncnc2cc([N+](=O)[O-])ccc12)N(CCc1ccccc1)Cc1ccccc1
c: Clc1ccc(CN2CCC(c3nc4ccc(Cl)cc4[nH]3)CC2)cc1
d: O=C(c1cccnc1)N(Cc1ccccc1)c1ccccc1
Answer: b. O=C(COc1ncnc2cc([N+](=O)[O-])ccc12)N(CCc1ccccc1)Cc1ccccc1
{#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#}
O=C(COc1ncnc2cc([N+](=O)[O-])ccc12)N(CCc1ccccc1)Cc1ccccc1
O=C(COc1ncnc2cc([N+](=O)[O-])ccc12)N(CCc1ccccc1)Cc1ccccc1
N-benzyl-2-(7-nitroquinazolin-4-yl)oxy-N-(2-phenylethyl)acetamide