Task: Answer the multiple choice question.
Query: Which compound has a 6.245\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, or c without using any additional words.
Options:
(a) COC(=O)CCC(=O)Nc1ccc(NC(=O)CCC(=O)OC)cc1
(b) CSc1nc(Oc2ccccc2)c2sccc2n1
(c) c1ccc(Cn2nnc(-c3ccccc3)n2)cc1
Answer: b. CSc1nc(Oc2ccccc2)c2sccc2n1
{#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#}
2-methylsulfanyl-4-phenoxythieno[3,2-d]pyrimidine