SYNTHETIC COMMUNICATIONS, 22(19), 2769-2780 (1992) ... In conclusion, this work presents simple synthetic routes to 4.5- and 7-niao-riluzole derivatives by direct nitration of riluzole ... MS GI) m/z(%): 312 and 314(22, M+.); 243 and 245 (28, -CF3); 215 and 217 (8,243 and 245 ...