Task: Answer the multiple choice question.
Question: Which compound exhibits a 2.574\% human ether-à-go-go related gene (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) CCOC(=O)N1CCN(C(=O)c2ccc3nc(SCc4ccc(F)cc4)n(C)c3c2)CC1
(b) COc1ccc(Cc2n[nH]c(=O)c3ccccc23)cc1OC
Answer: b. COc1ccc(Cc2n[nH]c(=O)c3ccccc23)cc1OC
{#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#}
4-[(3,4-dimethoxyphenyl)methyl]-2H-phthalazin-1-one