Task: Please answer the multiple choice question.
Question: Which molecules are a human ether-à-go-go related gene (hERG) blocker (<10uM)?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
[a] CCN(CC)CCNC(=O)c1cc(Br)c(N)cc1OC
[b] CCN1C(=O)COc2c(CCN3CCN(c4cccc5nc(C)ccc45)CC3)cccc21
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-ethyl-8-[2-[4-(2-methylquinolin-5-yl)piperazin-1-yl]ethyl]-1,4-benzoxazin-3-one