Task: Please answer the multiple choice question.
Question: Which molecule has the longest half life time in humans after IV administration?
Constraint: Even if you are uncertain, you must pick either a or b without using any other words.
Options:
a.) CCN1CC(CCN2CCOCC2)C(c2ccccc2)(c2ccccc2)C1=O
b.) C[C@@H](CN1CC(=O)NC(=O)C1)N1CC(=O)NC(=O)C1
Answer: b
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}
4-[(2S)-2-(3,5-dioxopiperazin-1-yl)propyl]piperazine-2,6-dione