Task: Answer the multiple choice question.
Question: Which compound exhibits a -3.942\% 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 additional words.
Options:
a. O=c1oc2ccccc2c2oc3cc(O)c(O)cc3c12
b. Cn1nc(-c2ccccc2)c(C#N)c1Sc1cccc(Cl)c1
c. O=C(CSc1nc2ccccc2[nH]1)c1ccc(Cl)s1
d. COc1cccc(C(=O)NC(=S)Nc2ccccc2N2CCCCC2)c1
Answer: a. O=c1oc2ccccc2c2oc3cc(O)c(O)cc3c12
{#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=c1oc2ccccc2c2oc3cc(O)c(O)cc3c12
O=c1oc2ccccc2c2oc3cc(O)c(O)cc3c12
8,9-dihydroxy-[1]benzofuro[3,2-c]chromen-6-one