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=[N+]([O-])c1cccc(S(=O)(=O)Nc2ccc(Cc3ccncc3)cc2)c1
b. CN(C)C(=O)Cn1c(SCC(=O)NCc2ccc3c(c2)OCO3)nc2ccccc21
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}