Task: Please answer the multiple choice question.
Question: Which molecules are a human ether-à-go-go related gene (hERG) blocking compound?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
[a] O=c1c2ccccc2nc(SCc2ccc([N+](=O)[O-])cc2)n1CCCO
[b] CCC(=O)N1CCN(c2ccc(Cl)cc2NC(=O)c2ccc(N3CCCC3)c([N+](=O)[O-])c2)CC1
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}