Task: Answer the multiple-choice question.
Question: Which compound exhibits a 3.974\% 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, or c without using any other words.
Options:
[a] O=[N+]([O-])c1c(Nc2ccccc2O)ccc2nonc12
[b] COc1ccc(S(=O)(=O)N2CCN(c3ccc4nnc(-c5ccccc5)n4n3)CC2)cc1
[c] O=C(NCc1ccncc1)C(=O)N/N=C/c1ccc(OCc2ccccc2)cc1
Answer: a. O=[N+]([O-])c1c(Nc2ccccc2O)ccc2nonc12
{#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=[N+]([O-])c1c(Nc2ccccc2O)ccc2nonc12
O=[N+]([O-])c1c(Nc2ccccc2O)ccc2nonc12
2-[(4-nitro-2,1,3-benzoxadiazol-5-yl)amino]phenol