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 additional words.
Options:
(a) CNCCCC1(C)CN(c2ccccc2)c2ccccc21
(b) CN1C(=O)NC(=O)C(C)(C2=CCCCC2)C1=O
(c) O=C(O)c1cc(=O)c2ccccc2o1
(d) OC(c1ccccc1)(c1ccccc1)C1CC1c1ccncc1
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}