Task: Answer the MCQ question.
Question: Which drug exhibits a 4.500\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a. C/C(=N\N=C(c1ccccc1)c1ccccc1)c1cccs1
b. CCC(CC)COC(=O)C(C#N)c1nc2ccccc2nc1N1CCOCC1
Answer: b. CCC(CC)COC(=O)C(C#N)c1nc2ccccc2nc1N1CCOCC1
{#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#}
2-ethylbutyl 2-cyano-2-(3-morpholin-4-ylquinoxalin-2-yl)acetate