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) CCCCN1CCC[C@H]1Cn1nc(Cc2ccc(Cl)cc2)c2ncccc2c1=O
b) CC1CCCN1CCc1ccc2nc(-c3ccn[nH]3)ccc2c1
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}
6-[[(2S)-1-butylpyrrolidin-2-yl]methyl]-8-[(4-chlorophenyl)methyl]pyrido[2,3-d]pyridazin-5-one