Task: Answer the MCQ question.
Question: Which drug has a 2.596\% 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 other words.
Options:
a: COc1cccc(N2CCN(C(=O)CN3C(=O)NC4(CCCC4)C3=O)CC2)c1
b: CCn1c(COC(=O)CNC(=O)c2cc(OC)c(OC)c(OC)c2)nc2cc(S(=O)(=O)N(C)C)ccc21
c: COC(=O)C(C(=O)OC)C(C[N+](=O)[O-])c1ccc(O)c(OC)c1
d: COc1ccccc1N1CCN(C2CCN(C(=O)c3cc(OC)c(OC)c(OC)c3)CC2)CC1
Answer: c. COC(=O)C(C(=O)OC)C(C[N+](=O)[O-])c1ccc(O)c(OC)c1
{#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#}
COC(=O)C(C(=O)OC)C(C[N+](=O)[O-])c1ccc(O)c(OC)c1
COC(=O)C(C(=O)OC)C(C[N+](=O)[O-])c1ccc(O)c(OC)c1
dimethyl 2-[1-(4-hydroxy-3-methoxyphenyl)-2-nitroethyl]propanedioate