Task: Answer the MCQ question.
Query: Which compound has a 21.019\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a, b, c, d, or e without using any other words.
Options:
(a) O=C(Nc1ccc(Br)c(C(F)(F)F)c1)c1ccc(C(F)(F)F)cc1
(b) O=C(NCC(c1ccco1)N1CCCCC1)c1ccc(NS(=O)(=O)c2ccc(F)cc2)cc1
(c) Cc1cc2cc(NC(=O)c3ccco3)ccc2[nH]1
(d) CC1C2C(C)N(C)C(=O)N(C)C2N(C)C(=O)N1C
(e) Cc1ccc(/C=N/NC(=O)CCn2nc(C)cc2C)c(C)c1
Answer: d. CC1C2C(C)N(C)C(=O)N(C)C2N(C)C(=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#}
CC1C2C(C)N(C)C(=O)N(C)C2N(C)C(=O)N1C
CC1C2C(C)N(C)C(=O)N(C)C2N(C)C(=O)N1C
1,3,4,5,6,8-hexamethyl-4,4a,5,8a-tetrahydropyrimido[4,5-d]pyrimidine-2,7-dione