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, b, c, or d without using any other words.
Options:
a. CCOC1c2ccccc2C(=O)N(C)c2ccccc21
b. OC1CCN(c2ccc(-c3ccccc3Cl)nn2)CC1
c. Cc1[nH]nc2c1N(c1ccccc1)C(=O)CC(=O)N2C
d. Cc1nc2n(n1)C(N1CCN(C)CC1)=Nc1ccccc1C2
Answer: a, b, c, d
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}