Task: Answer the MCQ question.
Query: Which compound exhibits a -4.926% hERG inhibition at a concentration of 10uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
a O=C(CN1CCOCC1)NC1CC2CCC1C2
b Cc1ccc(O)c(C(=O)c2cnn(C(=O)COc3ccc(Cl)cc3)c2)c1
c O=S(=O)(NCc1ccccc1F)c1cccc(S(=O)(=O)N2CCOCC2)c1
d COc1cccc2[nH]c3c(Cl)ncnc3c12
Answer: d. COc1cccc2[nH]c3c(Cl)ncnc3c12
{#Task|Problem statement!}: Answer the {#multiple choice|multiple-choice|MCQ!} question.
{#Question|Query!}: Which {#compound|drug!} {#has|exhibits!} a {herg_central_at_10uM#}{herg_central_at_10uM__units} {herg_central_at_10uM__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_10uM%}
Answer: {%multiple_choice_result}. {SMILES#}
COc1cccc2[nH]c3c(Cl)ncnc3c12
COc1cccc2[nH]c3c(Cl)ncnc3c12
4-chloro-9-methoxy-5H-pyrimido[5,4-b]indole