Task: Please answer the multiple choice question.
Question: Which molecules are a hERG blocking compound (<10uM)?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a: COc1ccc2c(C)cc(=O)n(CCN3CCC(NCc4cc5c(cn4)OCCO5)CC3)c2c1
b: CSc1sc(C(=N)N)cc1S(=O)(=O)c1cccc(-c2cccc(C)n2)c1
Answer: b
Task: Please answer the multiple choice question.
Question: Which molecules are {herg_blocker#not &NULL}a {herg_blocker__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_blocker%}
Answer: {%multiple_choice_result}
4-[3-(6-methylpyridin-2-yl)phenyl]sulfonyl-5-methylsulfanylthiophene-2-carboximidamide