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 other words.
Options:
[a] CCC(=O)C1(c2cccc(O)c2)CCN(C)CC1
[b] CCOC(=O)Nc1ccc(NCc2ccc(F)cc2)nc1N
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}
ethylN-[2-amino-6-[(4-fluorophenyl)methylamino]pyridin-3-yl]carbamate