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: C[N+](C)([O-])CCCN1c2ccccc2CCc2ccccc21
b: CN1CCC(=C2c3ccccc3CCc3sccc32)CC1
c: Clc1ccc(COC(Cn2ccnc2)c2ccc(Cl)cc2Cl)c(Cl)c1
d: CN1CCN(CC/C=C2\c3ccccc3Sc3ccc(S(=O)(=O)N(C)C)cc32)CC1
Answer: a, b, 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}