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) CN1C(=O)CN=C(c2ccccc2F)c2cc([N+](=O)[O-])ccc21
b) O=C(O)Cn1c(=O)c(=O)[nH]c2cc([N+](=O)[O-])c(-n3ccnc3)cc21
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}
5-(2-fluorophenyl)-1-methyl-7-nitro-3H-1,4-benzodiazepin-2-one