Task: Please answer the multiple choice question.
Question: Which molecules are a human ether-à-go-go related gene (hERG) blocking compound (<10uM)?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a: COCCN1CCC[C@H]1Cn1nc(Cc2ccc(Cl)cc2)c2cnccc2c1=O
b: CN1C[C@@H]2C[C@H]1CN2c1cnc(-c2ccc3[nH]ccc3c2)cn1
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}
4-[(4-chlorophenyl)methyl]-2-[[(2S)-1-(2-methoxyethyl)pyrrolidin-2-yl]methyl]pyrido[3,4-d]pyridazin-1-one