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, b, or c without using any additional words.
Options:
a: Nc1ccnc(N2CCC3(CC2)O[C@@H](c2ccccc2)c2ccccc23)c1
b: Nc1nc(CC(=O)Nc2ccc(C[C@@H]3CC[C@H]([C@H](O)c4ccccc4)N3)cc2)cs1
c: CC#C[C@]1(O)CC[C@H]2[C@@H]3CCC4=CC(=O)CCC4=C3[C@@H](c3ccc(N(C)C)cc3)C[C@@]21C
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-[(1S)-1-phenylspiro[1H-2-benzofuran-3,4'-piperidine]-1'-yl]pyridin-4-amine