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 other words.
Options:
a: CC(C)(C)c1nc(-c2ccc(OC(F)(F)F)cc2)c[nH]1
b: CCCOCCn1c(=O)c(N2CCNCC2)nc2cnc(-c3ccc(OC)nc3)cc21
Answer: a
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}
2-tert-butyl-4-[4-(trifluoromethyloxy)phenyl]-1H-imidazole