Task: Please answer the multiple choice question.
Question: Which molecules are not penetrating the blood brain barrier to reach the brain?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a: CC(C)CC(N(C)C)C1(c2ccc(Cl)cc2)CCC1
b: CC(=O)OCC1=C(C(=O)O)N2C(=O)[C@@H](NC(=O)Cc3cccs3)[C@H]2SC1
Answer: b
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}