Task: Please answer the multiple choice question.
Question: Which molecules are a hERG blocker (<10uM)?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a: COc1cc(N2CCN(C(=O)[C@H](C)O)CC2)ccc1Nc1ncc(Cl)c(-c2cnc3ccccn23)n1
b: Cc1ncc(CN[C@@H]2CCN(CCn3c(=O)ccc4ncc(F)cc43)C[C@@H]2F)cc1C#N
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}
(2S)-1-[4-[4-[(5-chloro-4-imidazo[1,2-a]pyridin-3-ylpyrimidin-2-yl)amino]-3-methoxyphenyl]piperazin-1-yl]-2-hydroxypropan-1-one