Task: Please answer the multiple choice question.
Question: Which molecules are not a hERG blocker?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a.) O=C(NCCCc1ccccc1)c1cccc([N+](=O)[O-])c1
b.) CCn1c(=O)c(C(=O)CN(C)Cc2cccc(OC)c2OC)c(N)n(Cc2ccccc2)c1=O
Answer: a
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}