Task: Please answer the multiple choice question.
Question: Which molecules are a human ether-à-go-go related gene (hERG) blocker (<10uM)?
Constraint: You must select none, one or more options from a, b, c, or d without using any additional words.
Options:
a. Fc1ccc(-n2cc(C3CCN(CCN4CCN=C4S)CC3)c3ccccc32)cc1
b. COc1c(N2CCC(CNCCC#N)C2)c(F)cc2c(=O)c(C(=O)O)cn(C3CC3)c12
c. O=C(O)c1ccc(Nc2ncc3c(n2)-c2ccc(Cl)cc2C(c2c(F)cccc2F)=NC3)cc1
d. CC(C)N1CCN(C(=O)N2CCc3ccccc3C2)CC1
Answer: a
Task: Please answer the multiple choice question.
Question: Which molecules are {herg_blocker#not &NULL}a {herg_blocker__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_blocker%}
Answer: {%multiple_choice_result}
1-[2-[4-[1-(4-fluorophenyl)indol-3-yl]piperidin-1-yl]ethyl]-4,5-dihydroimidazole-2-thiol