Task: Please answer the multiple choice question.
Question: Which molecules are not penetrating the blood brain barrier?
Constraint: You must select none, one or more options from a, b, or c without using any additional words.
Options:
a: CN1/C(=C(\O)Nc2ccccn2)C(=O)c2sccc2S1(=O)=O
b: CCNC1(c2ccccc2)CCCCC1
c: O=C1CC2(CCCC2)CC(=O)N1CCCCN1CCN(c2ncccn2)CC1
Answer: a
Task: Please answer the multiple choice question.
Question: Which molecules are {penetrate_BBB#not &NULL}{penetrate_BBB__names__adjective}?
Constraint: You must select none, one or more options from {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%penetrate_BBB%}
Answer: {%multiple_choice_result}