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 not sure, you must pick either a, b, or c without using any other words.
Options:
a: N=C(N)c1ccc(C(=O)N[C@@H](Cc2ccc(O)cc2)C(=O)N2CCC(OCC(=O)O)CC2)cc1
b: O=P1(NCCCl)OCCCN1CCCl
c: COC(=O)C1=C(C)NC(C)=C(C(=O)OCCN(C)Cc2ccccc2)C1c1cccc([N+](=O)[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}
N,3-bis(2-chloroethyl)-2-oxo-1,3,2λ5-oxazaphosphinan-2-amine