Task: Answer the multiple choice question.
Question: Which compound has a -1.975\% hERG inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a: CCCN1CCN(CCCNC(=O)c2cc3c(s2)-c2c(C)cccc2OC3)CC1
b: COc1cc(C)c(CN2CCN(c3ccccc3)CC2)cc1C
Answer: b. COc1cc(C)c(CN2CCN(c3ccccc3)CC2)cc1C
{#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#}
COc1cc(C)c(CN2CCN(c3ccccc3)CC2)cc1C
COc1cc(C)c(CN2CCN(c3ccccc3)CC2)cc1C
1-[(4-methoxy-2,5-dimethylphenyl)methyl]-4-phenylpiperazine