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 additional words.
Options:
a.) CCN(CC)CCn1cnc2c1c(=O)n(C)c(=O)n2C
b.) O=c1[nH]c2ccccc2n1C1CCN(CCOc2ccccc2)CC1
c.) OC(c1ccccc1)(c1ccccc1)C1CCCCN1
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}