Task: Answer the multiple choice question.
Query: Which drug exhibits a 18.816\% 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: COC(=O)C[n+]1cccc2ccccc21.[Cl-]
b: CCOCC(=O)Nc1c(C(=O)OCC)oc2ccccc12
Answer: a. COC(=O)C[n+]1cccc2ccccc21.[Cl-]
{#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#}
COC(=O)C[n+]1cccc2ccccc21.[Cl-]
COC(=O)C[n+]1cccc2ccccc21.[Cl-]
methyl 2-quinolin-1-ium-1-ylacetate;chloride