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 other words.
Options:
a. CCC1(c2ccccc2)C(=O)NCNC1=O
b. CNCCOC(c1ccccc1)c1ccccc1C
c. CNCCC=C1c2ccccc2C2CC2c2ccccc21
d. OCCN1CCN(CC/C=C2/c3ccccc3Sc3ccc(C(F)(F)F)cc32)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}