Task: Answer the multiple choice question.
Question: Which compound exhibits a 21.676\% 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) CCN(CC)c1ccc(/C=c2\sc3nnc(-c4ccccc4Cl)n3c2=O)cc1
(b) O=C(O)c1ccc2cccnc2n1
(c) Cc1nc(N(C)Cc2ccccc2)c2c(C)c(C)sc2n1
(d) C=CCOc1ccc(CNn2c(C)n[nH]c2=S)cc1OC
Answer: b. O=C(O)c1ccc2cccnc2n1
{#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(O)c1ccc2cccnc2n1
O=C(O)c1ccc2cccnc2n1
1,8-naphthyridine-2-carboxylicacid