Task: Answer the MCQ question.
Query: Which drug has a 2.664\% 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=c1[nH]c(CN2CCCCC2)nc2c1C1(CCCCC1)Cc1ccccc1-2
b. CCOC(=O)c1cc2sc(C)cc2n1C(C)C(=O)OCC
c. COc1cc(CN(C(=O)c2ccco2)c2ccc(C)cc2)ccc1O
Answer: b. CCOC(=O)c1cc2sc(C)cc2n1C(C)C(=O)OCC
{#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#}
CCOC(=O)c1cc2sc(C)cc2n1C(C)C(=O)OCC
CCOC(=O)c1cc2sc(C)cc2n1C(C)C(=O)OCC
ethyl 4-(1-ethoxy-1-oxopropan-2-yl)-2-methylthieno[3,2-b]pyrrole-5-carboxylate