Task: Answer the multiple-choice question.
Query: Which drug exhibits a 12.596\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
(a) CCNC(=S)NNC(=O)CSc1nc2ccccc2[nH]1
(b) Cc1c(NC(=O)CSc2nccn2C)c(=O)n(-c2ccccc2)n1C
Answer: a. CCNC(=S)NNC(=O)CSc1nc2ccccc2[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#}
CCNC(=S)NNC(=O)CSc1nc2ccccc2[nH]1
CCNC(=S)NNC(=O)CSc1nc2ccccc2[nH]1
1-[[2-(1H-benzimidazol-2-ylsulfanyl)acetyl]amino]-3-ethylthiourea