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] CN1CCN(C2=Nc3ccccc3Oc3ccc(Cl)cc32)CC1
[b] C[C@H]1c2ccccc2[C@@H](CCCN(C)C)c2cc(C(F)(F)F)ccc21
[c] N#Cc1cc(-c2ccccc2)nnc1NCCN1CCOCC1
[d] O=C1CCC(C(=O)NC2CC2c2ccccc2)N1
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}