Task: Please answer the multiple choice question.
Question: Which molecules are a hERG blocking compound (<10uM)?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a. CN1CCN(c2cc(Cl)c3nc(Nc4ccc(Br)cn4)[nH]c3c2)CC1
b. O=C(c1cccc(Cl)c1Cl)N(C1=CCOC=C1)[C@H]1CCNC1
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-(5-bromopyridin-2-yl)-4-chloro-6-(4-methylpiperazin-1-yl)-1H-benzimidazol-2-amine