Task: Please answer the multiple choice question.
Question: Which molecules are not a substrate for CYP2D6?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a: COC(=O)C1=C(C)NC(C)=C(C(=O)OCC(C)C)[C@H]1c1ccccc1[N+](=O)[O-]
b: COc1ccc2c3c1O[C@H]1C(=O)CC[C@H]4[C@@H](C2)N(C)CC[C@]314
Answer: a
Task: Please answer the multiple choice question.
Question: Which molecules are {CYP2D6_Substrate#not &NULL}a {CYP2D6_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%CYP2D6_Substrate%}
Answer: {%multiple_choice_result}