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. COc1ccc([C@H]2CN(CCc3ccc(OC)c(OC)c3)C[C@@H]2Cc2nc3ccc(Cl)cc3[nH]2)cc1
b. COc1ccc2ncc(=O)n(CCN3CC[C@H](NCc4cc5c(cn4)OCCO5)[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}
6-chloro-2-[[(3R,4S)-1-[2-(3,4-dimethoxyphenyl)ethyl]-4-(4-methoxyphenyl)pyrrolidin-3-yl]methyl]-1H-benzimidazole