Task: Please answer the multiple choice question.
Question: Which molecules are not a human ether-à-go-go related gene (hERG) blocker?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a: O=C(COc1ccc(F)c(Cl)c1)N1CCN(c2ccccn2)CC1
b: CCOC(=O)C(NC(C)=O)(Nc1ccc(S(=O)(=O)Nc2ccncn2)cc1)C(F)(F)F
Answer: b
Task: Please answer the multiple choice question.
Question: Which molecules are {herg_inhib#not &NULL}a {herg_inhib__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_inhib%}
Answer: {%multiple_choice_result}