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 uncertain, you must pick either a, b, or c without using any other words.
Options:
a.) Nc1ncnc2c1ncn2CCOCP(=O)(O)O
b.) CCC(=O)C1(c2cccc(O)c2)CCN(C)CC1
c.) CCCCCCCCC/C=C/C=C/C(=O)CCC(=O)NC1[C@H](C(O)CO)O[C@H](Nc2ncnc3nc[nH]c23)[C@H](O)[C@@H]1O
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}
9-[2-(phosphonomethoxy)ethyl]purin-6-amine