Task: Please answer the multiple choice question.
Question: Which molecules are penetrating the blood brain barrier?
Constraint: You must select none, one or more options from a, b, c, d, or e without using any other words.
Options:
a. Cc1cccc(C)c1NC(=O)c1ccc(N)cc1
b. CC1C2Cc3ccc(O)cc3C1(C)CCN2CCc1ccccc1
c. Nc1nc(N)c2nc(-c3ccccc3)c(N)nc2n1
d. Fc1cccc(Br)c1NC1=NCCN1
e. O=C1CN=C(c2ccccn2)c2cc(Br)ccc2N1
Answer: a, b, d, e
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}