Task: Answer the MCQ question.
Query: Which drug exhibits a -19.042\% 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 O=C(COC(=O)CNC(=O)c1ccc([N+](=O)[O-])o1)Nc1ncc(C(F)(F)F)cc1Cl
b COc1ccc(OC)c(N(CC(=O)Nc2ccccc2C(=O)NCc2ccco2)S(C)(=O)=O)c1
c CCOC(=O)c1sc(NC(=O)CCC(=O)O)nc1C
d CCCOc1ccc(C(=O)Nc2cc(S(=O)(=O)N3CCOCC3)ccc2N2CCOCC2)cc1
Answer: a. O=C(COC(=O)CNC(=O)c1ccc([N+](=O)[O-])o1)Nc1ncc(C(F)(F)F)cc1Cl
{#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#}
O=C(COC(=O)CNC(=O)c1ccc([N+](=O)[O-])o1)Nc1ncc(C(F)(F)F)cc1Cl
O=C(COC(=O)CNC(=O)c1ccc([N+](=O)[O-])o1)Nc1ncc(C(F)(F)F)cc1Cl
[2-[[3-chloro-5-(trifluoromethyl)pyridin-2-yl]amino]-2-oxoethyl] 2-[(5-nitrofuran-2-carbonyl)amino]acetate