General Formula [I] (where R2 and R3 each denotes an unsubstituted aryl group; R1 and R4 each denotes an aryl group having a specific substituent such as methoxy group; and R5 and R6 each denotes a cyano...http://www.google.com/patents/US6790974?utm_source=gb-gplus-sharePatent US6790974 - Bis(aminostyryl) naphthalene compound, synthesis intermediate thereof, and process for production thereofAdvan