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, d, or e without using any additional words.
Options:
a. Cc1nc2ccccc2c(=O)n1-c1ccccc1Cl
b. Nc1nc(NC2CC2)c2ncn([C@H]3C=C[C@@H](CO)C3)c2n1
c. Cc1nc2ccccc2c(=O)n1-c1ccccc1Cl
d. COc1ccc2c(c1)/C(=C/CCN(C)C)c1ccccc1O2
e. O=[N+]([O-])C1=CC=NC1NCCSCc1ccccn1
Answer: a, b, c, 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}