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 or b without using any other words.
Options:
a) Cc1c2c(n3c1CCCN1CCCC[C@@H]1CNc1cc-3ccc1C(N)=O)CC(C)(C)CC2=O
b) O=C1C(c2c(O)[nH]c3ccccc23)=Nc2ccccc21
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}
(19R)-5,5,9-trimethyl-7-oxo-2,14,21-triazapentacyclo[20.3.1.02,10.03,8.014,19]hexacosa-1(26),3(8),9,22,24-pentaene-23-carboxamide