Task: Answer the multiple-choice question.
Question: Which drug exhibits a 6.893\% 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] Br.O=C(CN1C2=NCCN2c2ccccc21)c1cccs1
[b] CN(CCOc1ccccc1)C(=O)c1ccc(F)c(S(=O)(=O)N2CCOCC2)c1
[c] CC1(C)S[C@@H]2C(C(=O)OCc3ccccc3)NC(=O)N2C1C(=O)OCc1ccccc1
[d] COc1ccc(N2C(=O)C(Cl)=C(Nc3c(C)n(C)n(-c4ccccc4)c3=O)C2=O)cc1
Answer: a. Br.O=C(CN1C2=NCCN2c2ccccc21)c1cccs1
{#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#}
Br.O=C(CN1C2=NCCN2c2ccccc21)c1cccs1
Br.O=C(CN1C2=NCCN2c2ccccc21)c1cccs1
2-(1,2-dihydroimidazo[1,2-a]benzimidazol-4-yl)-1-thiophen-2-ylethanone;hydrobromide