Task: Please answer the multiple choice question.
Question: Which molecules are penetrating the blood brain barrier to reach the brain?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
[a] CCN(CC)c1ccc(NC(=O)c2ccccc2N)c(C)c1
[b] NC(N)=NC(=O)c1nc(Cl)c(N)nc1N
Answer: a, b
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}