Task: Please answer the multiple choice question.
Question: Which molecules are a CYP2C9 substrate?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
a. CC(C)C1CCC(C(=O)N[C@H](Cc2ccccc2)C(=O)O)CC1
b. CN1CCN(CCCCN2C(=O)CN(/N=C\c3ccc(-c4ccc(Cl)cc4)o3)C2=O)CC1
c. COC(=O)C1=C(C#N)NC(C)=C(C(=O)OC(C)C)[C@H]1c1cccc([N+](=O)[O-])c1
d. CC1=C(C(=O)OCCN(Cc2ccccc2)c2ccccc2)[C@H](c2cccc([N+](=O)[O-])c2)C(P2(=O)OCC(C)(C)CO2)=C(C)N1
Answer: a
Task: Please answer the multiple choice question.
Question: Which molecules are {CYP2C9_Substrate#not &NULL}a {CYP2C9_Substrate__names__noun}?
Constraint: You must select none, one or more options from {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%CYP2C9_Substrate%}
Answer: {%multiple_choice_result}