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, b, or c without using any other words.
Options:
a. COc1cc2c3c(c1O)C1(C=CC(=O)C=C1)CC3N(C)CC2
b. CN(C)CCOC(c1ccccc1)c1ccccc1
c. CC(O)Cn1cnc2c1c(=O)n(C)c(=O)n2C
Answer: a, b, c
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}