Task: Answer the multiple choice question.
Question: Which drug exhibits a 1.918\% human ether-à-go-go related gene (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 additional words.
Options:
[a] O=C1CC(/C=C/c2ccncc2)=Nc2ccccc2N1
[b] CSc1ccc(CN2CCN(C(=O)COc3cccc(C)c3)CC2)cc1
[c] Cc1[nH]n(-c2ccccc2)c(=O)c1/C=N/NC(=O)c1ccc(O)cc1O
[d] CCN1CCN(c2c(Cl)cccc2NC(=O)c2ccco2)CC1
Answer: a. O=C1CC(/C=C/c2ccncc2)=Nc2ccccc2N1
{#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=C1CC(/C=C/c2ccncc2)=Nc2ccccc2N1
O=C1CC(/C=C/c2ccncc2)=Nc2ccccc2N1
4-[(E)-2-pyridin-4-ylethenyl]-1,3-dihydro-1,5-benzodiazepin-2-one