Task: Answer the multiple-choice question.
Query: Which drug exhibits a -6.958\% 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, b, c, or d without using any additional words.
Options:
(a) CCOc1ccc(NCCC#N)cc1
(b) Cc1cnc(-c2nnc(N(C)C(=O)c3cccnc3)s2)cn1
(c) Nn1c(-c2ccccc2)nnc1-c1ccccc1
(d) CCOC(=O)c1c(-n2c(C)cc(C=C3C(=O)NC(=S)NC3=O)c2C)sc2c1CCCC2
Answer: a. CCOc1ccc(NCCC#N)cc1
{#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#}
3-(4-ethoxyanilino)propanenitrile