1,3-Benzenedicarbonitrile, 2,4,6-trimethyl-, N,N'-dioxide (9CI) 15138-43-9 2,4,6-Trimethylisophthalonitrile N,N'-dioxide BRN 3096014 ISOPHTHALONITRILE, 2,4,6-TRIMETHYL-, N,N'-DIOXIDE NSC 93008