Task: Please answer the multiple choice question.
Question: Which molecules are penetrating the blood brain barrier?
Constraint: You must select none, one or more options from a, b, c, or d without using any additional words.
Options:
a) CN1C2CCC1CC(OC(=O)C(CO)c1ccccc1)C2
b) c1ccc(C2CCN(CC3CCCc4c3ccc3c4OCO3)C2)cc1
c) O=C1CC2(CCCC2)CC(=O)N1CCCCN1CCN(c2nsc3ccccc23)CC1
d) C[N+](C)([O-])CCCN1c2ccccc2CCc2ccccc21
Answer: 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}