Task: Please answer the multiple choice question.
Question: Which molecule has the longest half life in humans after IV administration?
Constraint: Even if you are not sure, you must pick either a or b without using any additional words.
Options:
a: CCC(=O)C1(c2cccc(O)c2)CCN(C)CC1
b: C[C@H]([C@](O)(Cn1cncn1)c1ccc(F)cc1F)S(C)(=O)=O
Answer: a
Task: Please answer the multiple choice question.
Question: Which molecule has the longest {half_life_duration__names__noun}?
Constraint: Even if you are {#uncertain|not sure!}, you must pick either {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%half_life_duration%}
Answer: {%multiple_choice_result}
1-[4-(3-hydroxyphenyl)-1-methylpiperidin-4-yl]propan-1-one