Task: Answer the multiple choice question.
Query: Which compound exhibits a 18.993\% hERG inhibition at 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)c1cccc(NC(=O)CN2CCN(Cc3ccccc3)CC2)c1
b Cc1ccc(C)c(N2CCN(C(=O)CCS(=O)(=O)c3ccc4c(c3)NC(=O)CO4)CC2)c1
c C=CCN1C(=O)C2C(C(=O)NC3CCCC3)C3C=CC2(O3)C1C(=O)NC1CCCC1
d O=C(Cc1cccc2ccccc12)N/N=C/c1ccc(Sc2nc3ccccc3s2)o1
Answer: d. O=C(Cc1cccc2ccccc12)N/N=C/c1ccc(Sc2nc3ccccc3s2)o1
{#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(Cc1cccc2ccccc12)N/N=C/c1ccc(Sc2nc3ccccc3s2)o1
O=C(Cc1cccc2ccccc12)N/N=C/c1ccc(Sc2nc3ccccc3s2)o1
N-[(E)-[5-(1,3-benzothiazol-2-ylsulfanyl)furan-2-yl]methylideneamino]-2-naphthalen-1-ylacetamide