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 other words.
Options:
(a) O=C(O)C(=O)O.O=[N+]([O-])c1ccc(N2CCN(Cc3ccc([N+](=O)[O-])o3)CC2)cc1
(b) CCOc1ccccc1N1CC(C(=O)NNC(=O)c2cc(OC)c(OC)c(OC)c2)CC1=O
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}