Task: Please answer the multiple choice question.
Question: Which molecule has the longest drug half life time in humans after IV administration?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a. N#CC(CCN1CCC(C(N)=O)(N2CCCCC2)CC1)(c1ccccc1)c1ccccc1
b. CC(C(=O)O)c1ccc(C(=O)c2cccs2)cc1
c. O=C1CN(/N=C/c2ccc([N+](=O)[O-])o2)C(=O)N1
d. CCOC(=O)C1(c2ccccc2)CCN(C)CC1
Answer: d
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}
ethyl1-methyl-4-phenylpiperidine-4-carboxylate