Task: Answer the multiple choice question.
Query: Which compound exhibits a 1.870\% 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 additional words.
Options:
a COC(=O)C1C(=O)c2c([nH]c(C(=O)OC3CCCC3)c2C)CC1C
b O=C(CN1CCCCCCC1)Nc1cc(Cl)cc(Cl)c1
c Cc1ccc(N2C(=O)C(Cc3ccccc3)NC2=S)cc1
d NC(=O)CC(NC(=O)Cc1ccc(Cl)cc1)c1ccc(NCCOc2ccccc2)c([N+](=O)[O-])c1
Answer: a. COC(=O)C1C(=O)c2c([nH]c(C(=O)OC3CCCC3)c2C)CC1C
{#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)C1C(=O)c2c([nH]c(C(=O)OC3CCCC3)c2C)CC1C
COC(=O)C1C(=O)c2c([nH]c(C(=O)OC3CCCC3)c2C)CC1C
2-O-cyclopentyl 5-O-methyl 3,6-dimethyl-4-oxo-1,5,6,7-tetrahydroindole-2,5-dicarboxylate