Task: Answer the multiple-choice question.
Question: Which drug exhibits a 20.779\% hERG inhibition at 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
a: COc1ccc(CC(=O)NC2CCN(CC(=O)N3CCCc4ccccc43)CC2)cc1OC.Cl
b: CCCOC(=O)c1ccc(Oc2cn[nH]c2-c2ccc(OCC)cc2O)cc1
c: O=C(NCC(=O)N1CCC2(CC1)NCCc1[nH]cnc12)c1ccc(Br)cc1
d: O=[N+]([O-])c1ccc(O)c(/C=N/Nc2ccccc2[N+](=O)[O-])c1
Answer: c. O=C(NCC(=O)N1CCC2(CC1)NCCc1[nH]cnc12)c1ccc(Br)cc1
{#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(NCC(=O)N1CCC2(CC1)NCCc1[nH]cnc12)c1ccc(Br)cc1
O=C(NCC(=O)N1CCC2(CC1)NCCc1[nH]cnc12)c1ccc(Br)cc1
4-bromo-N-(2-oxo-2-spiro[1,5,6,7-tetrahydroimidazo[4,5-c]pyridine-4,4'-piperidine]-1'-ylethyl)benzamide