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) CCNC1(c2ccccc2)CCCCC1
(b) OC(c1ccccc1)(c1ccccc1)C1CCCCN1
(c) O=C1CC2(CCCC2)CC(=O)N1CCCCN1CCN(c2ncccn2)CC1
(d) O=C1OCCC1C1(O)CCN(CCCN2c3ccccc3Sc3ccc(Cl)cc32)CC1
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}