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 or b without using any additional words.
Options:
a. CCN(C(=O)Cc1ccc(S(C)(=O)=O)cc1)C1CCN(CC[C@@H](c2cc(F)cc(F)c2)N2CCN(S(C)(=O)=O)CC2)CC1
b. Cc1c(OC2CCN(CC3CCN([C@@H](Cc4ccc(F)cc4)C(=O)O)CC3)CC2)ccc(Cl)c1Cl
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}
N-[1-[(3S)-3-(3,5-difluorophenyl)-3-(4-methylsulfonylpiperazin-1-yl)propyl]piperidin-4-yl]-N-ethyl-2-(4-methylsulfonylphenyl)acetamide