Task: Please answer the multiple choice question.
Question: Which molecules are not penetrating the blood brain barrier?
Constraint: You must select none, one or more options from a, b, or c without using any other words.
Options:
a. CN1/C(=C(\O)Nc2ccccn2)C(=O)c2sccc2S1(=O)=O
b. CC1(C)S[C@@H]2[C@H](NC(=O)[C@H](NC(=O)Nc3cnc(Nc4ccc(S(N)(=O)=O)cc4)[nH]c3=O)c3ccc(O)cc3)C(=O)N2[C@H]1C(=O)O
c. O=C(CCCN1CC=C(n2c(=O)[nH]c3ccccc32)CC1)c1ccc(F)cc1
Answer: a, b
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}