CC(C)C1C(=O)NC(=O)NC1=O    mol34243    0_1
CC(C)C1C(=O)[N-]C(=O)NC1=O    mol34243    -1_1
CC(C)[c-]1c(=O)[nH]c(=O)[nH]c1=O    mol34243    -1_2