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] COc1cnc2ccc(=O)n(CCN3CC[C@@H](NCc4ccc5c(n4)NC(=O)CO5)[C@@H](OC)C3)c2c1
[b] CCN1CCN(c2cc3[nH]c(SC(C)(C)C)nc3cc2Cl)[C@H](C)C1
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}
2-tert-butylsulfanyl-5-chloranyl-6-[(2R)-4-ethyl-2-methyl-piperazin-1-yl]-1H-benzimidazole