Task: Please answer the multiple choice question.
Question: Which molecules are not a hERG blocker (<10uM)?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
[a] CCN(CC)c1ccc(NC(=O)C2(NC(=O)OC(C)C)CCc3cccc(Br)c3C2)cc1
[b] CC1(C)[C@H](Nc2c(C(N)=O)cnn3cc(-c4ccc(C#N)cc4)cc23)CC[C@]1(C)N
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-[[(1R,3S)-3-amino-2,2,3-trimethylcyclopentyl]amino]-6-(4-cyanophenyl)pyrrolo[1,2-b]pyridazine-3-carboxamide