Task: Answer the MCQ question.
Question: Which drug exhibits a 5.436\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a: C=CCSc1nc(Oc2ccccc2)c2sccc2n1
b: COc1ccc(NC(=O)n2nc(OC(=O)c3cccs3)cc2N)cc1
Answer: a. C=CCSc1nc(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#}
C=CCSc1nc(Oc2ccccc2)c2sccc2n1
C=CCSc1nc(Oc2ccccc2)c2sccc2n1
[C][=C][C][S][C][=N][C][Branch1][#Branch2][O][C][=C][C][=C][C][=C][Ring1][=Branch1][=C][S][C][=C][C][Ring1][Branch1][=N][Ring1][S]
4-phenoxy-2-prop-2-enylsulfanylthieno[3,2-d]pyrimidine