Task: Answer the MCQ question.
Query: Which compound exhibits a 2.216\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
[a] CCOc1ccccc1-c1cc(-c2ccc(OC)cc2)nc2c1c(=O)n(C)c(=O)n2C
[b] COc1ccc(NC(=O)CCS(=O)(=O)c2ccc(OC)cc2)cc1
Answer: a. CCOc1ccccc1-c1cc(-c2ccc(OC)cc2)nc2c1c(=O)n(C)c(=O)n2C
{#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#}
CCOc1ccccc1-c1cc(-c2ccc(OC)cc2)nc2c1c(=O)n(C)c(=O)n2C
CCOc1ccccc1-c1cc(-c2ccc(OC)cc2)nc2c1c(=O)n(C)c(=O)n2C
5-(2-ethoxyphenyl)-7-(4-methoxyphenyl)-1,3-dimethylpyrido[2,3-d]pyrimidine-2,4-dione