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 other words.
Options:
(a) COc1ncc(-c2ccc([C@H]3C[C@H](N4CCC[C@H]4C)C3)cc2)cn1
(b) O=C(NCCN1CCCCC1)c1ccc(CN2CCC(NC(=O)c3cc(=O)c4ccc(F)cc4o3)CC2)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}
2-methoxy-5-[4-[3-[(2R)-2-methylpyrrolidin-1-yl]cyclobutyl]phenyl]pyrimidine