Task: Please answer the multiple choice question.
Question: Which molecules are a hERG blocker (<10uM)?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a. Cc1nc2ccccc2n1C1C[C@H]2CC[C@H](C1)N2CCC1(c2cccc(F)c2)CCN(C(=O)c2c(Cl)ccc(S(N)(=O)=O)c2Cl)CC1
b. O=C(O)c1cc(CN2CCN(c3ccc(Br)cc3)CC2)c2ccccn2c1=O
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}
1-[[4-(4-bromophenyl)piperazin-1-yl]methyl]-4-oxoquinolizine-3-carboxylic acid