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] NC(=O)Nc1sc(-c2ccc(F)cc2)cc1C(N)=O
[b] Cc1cc(-c2ccc3c(c2)CCN(CCCSc2nnc(C4CCOCC4)n2C)CC3)no1
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-(carbamoylamino)-5-(4-fluorophenyl)thiophene-3-carboxamide