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 additional words.
Options:
a. CCCC(=O)N(C)Cc1c(-c2ccc(Cl)cc2)nc2ccccn12
b. CNC1Cc2ccccc2N(C)c2ccccc21
c. C=CCN1C(=O)C(CC(C)C)NC1=S
d. c1ccc(C2CCN(CC3CCCc4c3ccc3c4OCO3)C2)cc1
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}