Task: Answer the multiple choice question.
Query: Which compound exhibits a 3.946\% 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) O=C(Nc1ccccc1)c1ccc2c(c1)OCCCO2
(b) CC1CN(c2ccc([N+](=O)[O-])c(NCCOc3ccccc3)c2)CCN1
Answer: b. CC1CN(c2ccc([N+](=O)[O-])c(NCCOc3ccccc3)c2)CCN1
{#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#}
CC1CN(c2ccc([N+](=O)[O-])c(NCCOc3ccccc3)c2)CCN1
CC1CN(c2ccc([N+](=O)[O-])c(NCCOc3ccccc3)c2)CCN1
5-(3-methylpiperazin-1-yl)-2-nitro-N-(2-phenoxyethyl)aniline