Task: Answer the multiple choice question.
Query: Which compound has a 12.247\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, or c without using any other words.
Options:
(a) O=c1c(Cc2ccccc2O)c(O)nc2n1CCCS2
(b) S=c1[nH]nc(-c2ccncc2)n1/N=C/c1cn(-c2ccccc2)nc1-c1ccc(Cl)cc1
(c) Cc1ccc(Nc2nnc(SCC(=O)Nc3ncc(C(F)(F)F)cc3Cl)s2)cc1
Answer: a. O=c1c(Cc2ccccc2O)c(O)nc2n1CCCS2
{#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=c1c(Cc2ccccc2O)c(O)nc2n1CCCS2
O=c1c(Cc2ccccc2O)c(O)nc2n1CCCS2
8-hydroxy-7-[(2-hydroxyphenyl)methyl]-3,4-dihydro-2H-pyrimido[2,1-b][1,3]thiazin-6-one