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: CNc1cc(Nc2cnc(C#N)c(O[C@H](C)CN(C)C)n2)ncc1C(F)(F)F
b: COc1cnc2ccc(=O)n(CCN3CC[C@@H](NCc4ccc5c(n4)NC(=O)CO5)[C@@H](OC)C3)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}
3-[(2R)-1-(dimethylamino)propan-2-yl]oxy-5-[[4-(methylamino)-5-(trifluoromethyl)pyridin-2-yl]amino]pyrazine-2-carbonitrile