Task: Please answer the multiple choice question.
Question: Which molecules are not a hERG blocker (<10uM)?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a C[C@@H]1NC(c2cnccn2)=NC1(c1ccc(F)cc1)c1ccc(F)cc1
b C[C@@H]1CCCN1CCc1ccc2nc(-c3cc(Br)no3)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}
2-[(5S)-4,4-bis(4-fluorophenyl)-5-methyl-1,5-dihydroimidazol-2-yl]pyrazine