Task: Answer the MCQ question.
Question: Which compound exhibits a -1.538\% human ether-à-go-go related gene (hERG) inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
(a) COc1ccc(-c2cc(C(=O)N3CCN(Cc4ccc5c(c4)OCO5)CC3)on2)cc1OC
(b) O=C(CN1CCc2ccccc2C1)Nc1ccccc1Cl
Answer: b. O=C(CN1CCc2ccccc2C1)Nc1ccccc1Cl
{#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(CN1CCc2ccccc2C1)Nc1ccccc1Cl
O=C(CN1CCc2ccccc2C1)Nc1ccccc1Cl
N-(2-chlorophenyl)-2-(3,4-dihydro-1H-isoquinolin-2-yl)acetamide