Task: Answer the MCQ question.
Query: Which drug exhibits a 2.138\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
a CCn1cc([N+](=O)[O-])c(C(=O)Nc2ccc(Br)cn2)n1
b CCOC(=O)CSc1nc2sc(C)c(C)c2c(=O)n1C
c Br.Cc1cccc(N2C(=O)SC(SC(=Nc3ccccc3)Nc3ccccc3)C2=O)c1
d Nc1nnc(SCC(=O)c2ccccc2)s1
Answer: b. CCOC(=O)CSc1nc2sc(C)c(C)c2c(=O)n1C
{#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#}
CCOC(=O)CSc1nc2sc(C)c(C)c2c(=O)n1C
CCOC(=O)CSc1nc2sc(C)c(C)c2c(=O)n1C
ethyl 2-(3,5,6-trimethyl-4-oxothieno[2,3-d]pyrimidin-2-yl)sulfanylacetate