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 uncertain, you must pick either a or b without using any other words.
Options:
a: CC(CC(c1ccccc1)c1ccccc1)NC(C)(C)C
b: COc1cc(OC)c(C(=O)CCCN2CCCC2)c(OC)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-pyrrolidin-1-yl-1-(2,4,6-trimethoxyphenyl)butan-1-one