Problem statement: Answer the multiple-choice question.
Query: Which drug has a 26.825\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
(a) CCCCNC(=O)NCCN1CCOCC1
(b) Cc1cc(C)c(S(=O)(=O)N2CCCOC2CNC(=O)C(=O)NCc2cccs2)c(C)c1
Answer: a. CCCCNC(=O)NCCN1CCOCC1
{#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#}
CCCCNC(=O)NCCN1CCOCC1
CCCCNC(=O)NCCN1CCOCC1
1-butyl-3-(2-morpholin-4-ylethyl)urea