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. O=c1[nH]c2cc(Cl)ccc2n1C1CCN(CC2COc3ccccc3O2)CC1
b. CN1/C(=C(\O)Nc2ccccn2)C(=O)c2sccc2S1(=O)=O
c. CCC(=O)C(c1ccccc1)(c1ccccc1)C(C)CN(C)C
d. CN(C)CCC1(C)OCCC2=C1c1ccccc1C2
Answer: a, 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}