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: NC1=N[C@@]2(CO1)c1cc(-c3cccnc3F)ccc1Oc1cnc(-c3ccnc(F)c3)cc12
b: Fc1ccc2c(C3CNCC[C@H]3F)c(-c3cccc4ccccc34)[nH]c2c1
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}
(4S)-7'-(2-fluoropyridin-3-yl)-3'-(2-fluoropyridin-4-yl)spiro[5H-1,3-oxazole-4,5'-chromeno[2,3-c]pyridine]-2-amine