Task: Answer the MCQ question.
Query: Which compound exhibits a 19.664\% 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) CCSCCOC(=O)C1=C(C)NC(=O)NC1c1ccc2c(c1)OCO2
b) N#CC1=C(N)Oc2cc(O)ccc2C1c1ccc(Br)s1
c) c1cc2c3c(cccc3c1)C(N1CCCCC1)=N2
d) Cc1cc(C)c(OCC(=O)NCCCn2nc(C)cc2C)c(C)c1
Answer: b. N#CC1=C(N)Oc2cc(O)ccc2C1c1ccc(Br)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#}
N#CC1=C(N)Oc2cc(O)ccc2C1c1ccc(Br)s1
N#CC1=C(N)Oc2cc(O)ccc2C1c1ccc(Br)s1
2-amino-4-(5-bromothiophen-2-yl)-7-hydroxy-4H-chromene-3-carbonitrile