The molecule with the SMILES CCCCC1C(=O)N(c2ccccc2)N(c2ccccc2)C1=O is not a CYP P450 2D6 substrate.
The molecule with the {SMILES__description} {#representation of |!}{SMILES#} is {CYP2D6_Substrate#not &NULL}a {CYP2D6_Substrate__names__noun}.