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 additional words.
Options:
[a] O=C1CN=C(c2ccccn2)c2cc(Br)ccc2N1
[b] O=C1NCC2(CCN(CCc3ccccc3)CC2)O1
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}
8-(2-phenylethyl)-1-oxa-3,8-diazaspiro[4.5]decan-2-one