Problem statement: Answer the multiple-choice question.
Query: Which drug exhibits a 9.454\% 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 or b without using any other words.
Options:
(a) O=c1[nH]c2ccccc2c(O)c1SCCO
(b) CCN(CC)S(=O)(=O)c1cc(NC(=O)CCNC(=O)c2ccccc2Cl)ccc1C
Answer: a. O=c1[nH]c2ccccc2c(O)c1SCCO
{#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=c1[nH]c2ccccc2c(O)c1SCCO
O=c1[nH]c2ccccc2c(O)c1SCCO
4-hydroxy-3-(2-hydroxyethylsulfanyl)-1H-quinolin-2-one