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 or b without using any additional words.
Options:
a: Cc1ccccc1-n1c(C)nc2ccccc2c1=O
b: COC1=C(C(=O)O)N2C(=O)C(NC(=O)C(N)C3C=CCC=C3)C2SC1
Answer: a
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}