Task: Answer the MCQ question.
Question: Which drug exhibits a 12.643\% 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) COC(=O)Nc1ccc(S(=O)(=O)N(C)C)cc1
b) O=c1cc2n(c(=O)[nH]1)CCC1=C2CCCC1
c) COc1ccc(-n2c(C)cc(/C=C/c3nc(O)c([N+](=O)[O-])c(=O)[nH]3)c2C)cc1
d) O=C(O)c1cccc(CSc2nnc(-c3ccco3)o2)c1
Answer: b. O=c1cc2n(c(=O)[nH]1)CCC1=C2CCCC1
{#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#}
6,7,8,9,10,11-hexahydropyrimido[6,1-a]isoquinoline-2,4-dione