99008-47-6 BRN 5912225 N,N-Diethyl-5-nitropyrazolo(3,4,5-kl)acridine-2(6H)-ethanamine PD 110,334 Pyrazolo(3,4,5-kl)acridine-2(6H)-ethanamine, N,N-diethyl-5-nitro-