Task: Answer the multiple choice question.
Question: Which compound has a 3.975\% 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 COc1ccc2[nH]c(=O)c(CNc3cccc(C)c3)cc2c1
b CCc1ccccc1N1CSC2=C(C#N)C(c3cc(OC)c(OC)cc3OC)CC(=O)N2C1
c CCN(CC)N=Nc1ccc(C(=O)[O-])cc1.[K+]
d Cc1ccc(C(=O)O)cc1S(=O)(=O)N1CCOCC1
Answer: a. COc1ccc2[nH]c(=O)c(CNc3cccc(C)c3)cc2c1
{#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#}
6-methoxy-3-[(3-methylanilino)methyl]-1H-quinolin-2-one