Task: Please answer the multiple choice question.
Question: Which molecules are a hERG blocking compound?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a. CS(=O)(=O)c1ccc(-n2nnc3ccccc32)c([N+](=O)[O-])c1
b. CN1CCN(c2nc3c(c(=O)[nH]c(=O)n3C)n2Cc2ccc([N+](=O)[O-])cc2)CC1
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}