The chemical with the SMILES Cn1nc(C(=O)Nc2cccnc2)c2ccccc2c1=O is not an inhibitor of the protein kinase A (PKA).
The {#molecule|compound|chemical|molecular species|chemical compound!} with the {SMILES__description} {#representation of |!}{SMILES#} is {MUV-548#not &NULL}{MUV-548__names__noun}.
Cn1nc(C(=O)Nc2cccnc2)c2ccccc2c1=O
Cn1nc(C(=O)Nc2cccnc2)c2ccccc2c1=O
3-methyl-4-oxo-N-pyridin-3-ylphthalazine-1-carboxamide