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 additional words.
Options:
a: CCOC(=O)C1=C(CN2CCOCC2)NC(c2nccs2)=NC1c1ccc(F)cc1Cl
b: COC(=O)C1=C(CN2CCOC[C@H]2C(=O)O)NC(c2nccs2)=N[C@H]1c1ccc(F)cc1Cl
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}
ethyl 4-(2-chloro-4-fluorophenyl)-6-(morpholin-4-ylmethyl)-2-(1,3-thiazol-2-yl)-1,4-dihydropyrimidine-5-carboxylate