Task: Answer the multiple-choice question.
Question: Which compound exhibits a -2.469\% 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, b, c, or d without using any additional words.
Options:
a CCN1CCN(CC(=O)n2c3c(c4ccccc42)CC(C)CC3)CC1
b O=C(CCCc1ccccc1)Nc1nnc(C(F)(F)F)s1
c CCN1CCC(=NNC(=O)c2ccc(C)c([N+](=O)[O-])c2)CC1
d COc1ccc(N(C(=O)c2ccco2)S(=O)(=O)c2cc(Cl)c(Cl)cc2Cl)cc1
Answer: b. O=C(CCCc1ccccc1)Nc1nnc(C(F)(F)F)s1
{#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(CCCc1ccccc1)Nc1nnc(C(F)(F)F)s1
O=C(CCCc1ccccc1)Nc1nnc(C(F)(F)F)s1
4-phenyl-N-[5-(trifluoromethyl)-1,3,4-thiadiazol-2-yl]butanamide