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 other words.
Options:
a.) CCCS(=O)(=O)C(=C1Nc2ccccc2N1)S(=O)(=O)CCC
b.) CO/N=C/c1ccc(N2CCN(C(=O)c3ccc(F)cc3)CC2)c([N+](=O)[O-])c1
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}