Problem statement: Answer the multiple choice question.
Question: Which drug exhibits a 21.315\% hERG inhibition at 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any additional words.
Options:
a O=c1cc(O)n(-c2ccccc2)c(=S)[nH]1
b O=C(CCSc1nc(-c2ccco2)cc(C(F)(F)F)n1)NCCc1ccccc1
c O=C(NCc1cccnc1)c1ccc2c(c1)N(Cc1ccccc1)CCS2
d Cc1nnc2ccc(-c3ccc(NC(=O)c4ccc(Cl)nc4)cc3)nn12
Answer: a. O=c1cc(O)n(-c2ccccc2)c(=S)[nH]1
{#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=c1cc(O)n(-c2ccccc2)c(=S)[nH]1
O=c1cc(O)n(-c2ccccc2)c(=S)[nH]1
6-hydroxy-1-phenyl-2-sulfanylidenepyrimidin-4-one